Re: [MBZ] Tachometer Amp
I could give the bi-polar one a go if I knew what the signal was supposed to be. It's an AC signal, your tachometer is a frequency meter. Got a signal generator? If not, don't worry. You have a broken tachometer in-hand, seems to me that the worst that can happen is that you end up with a broken tachometer. What have you to lose? I'd start with resoldering, and checking/replacing electrolytic capacitors. In the later 107 clusters there is a single ground, in the speedo, and it's easy to fry the trace, such as by dropping the clock power line against the back of the cluster as you take it out of the car. The whole cluster gets pretty freaky after that. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
What is the misfire gremlin? Since the tach is fed by opening and closing of the points... is the dwell set correctly? Jaime On Wed, May 15, 2013 at 11:53 PM, clay redgh...@comcast.net wrote: Well that makes it all more confusing. What the heck is going on that the little electric zaps are not being transmitted properly to the Tachometer? I have the haynes and maps of wires, but for some reason I can not trace it properly to where it should hook to the ignition system. Might this also be part of the misfire gremlin? clay On May 14, 2013, at 8:44 PM, Jim Cathey wrote: where the sensor/amp lives. No sensor, no amp. It vampires off of the ignition signal. You _need_ a car schematic! There are ones in Haynes, if nowhere else. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Jaime Kopchinski http://www.jaimekop.com/ ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
So far we have not popped the valve covers, but the points, condenser, plugs, wires, distributor and most timing things have been renewed. NEw fuel pump and working injectors put in. Fuel rail messed with. Still getting a bit of stumble and misfires. The Tach that came on the car was bibolar, fresh one does not hop around. clay On May 16, 2013, at 4:38 AM, Jaime Kopchinski wrote: What is the misfire gremlin? Since the tach is fed by opening and closing of the points... is the dwell set correctly? Jaime On Wed, May 15, 2013 at 11:53 PM, clay redgh...@comcast.net wrote: Well that makes it all more confusing. What the heck is going on that the little electric zaps are not being transmitted properly to the Tachometer? I have the haynes and maps of wires, but for some reason I can not trace it properly to where it should hook to the ignition system. Might this also be part of the misfire gremlin? clay On May 14, 2013, at 8:44 PM, Jim Cathey wrote: where the sensor/amp lives. No sensor, no amp. It vampires off of the ignition signal. You _need_ a car schematic! There are ones in Haynes, if nowhere else. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Jaime Kopchinski http://www.jaimekop.com/ ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
On May 16, 2013 7:46 PM, clay redgh...@comcast.net wrote: The Tach that came on the car was bibolar, fresh one does not hop around. What are the chances your new tach is mechanically or electrically bad? Why don't you try dismantling the old one and seeing if you can refurb it? Best, Tim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
I am not THAT gifted in refurbing these technical gizmos. I could give the bi-polar one a go if I knew what the signal was supposed to be. Do I hook this thing to a rheostat and spin the knob? That is the first thing that pops into my peanut sized brain. clay On May 16, 2013, at 7:08 PM, Tim Crone wrote: On May 16, 2013 7:46 PM, clay redgh...@comcast.net wrote: The Tach that came on the car was bibolar, fresh one does not hop around. What are the chances your new tach is mechanically or electrically bad? Why don't you try dismantling the old one and seeing if you can refurb it? Best, Tim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
On 14/05/2013 10:44 PM, Jim Cathey wrote: where the sensor/amp lives. No sensor, no amp. It vampires off of the ignition signal. You _need_ a car schematic! There are ones in Haynes, if nowhere else. -- Jim ___ So, either there is a problem in the wiring which is essentially one wire from the distributor to the tach and a ground (not counting any lighting) or the the tach itself is bad? Make sure the ground is good. Randy ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
Well that makes it all more confusing. What the heck is going on that the little electric zaps are not being transmitted properly to the Tachometer? I have the haynes and maps of wires, but for some reason I can not trace it properly to where it should hook to the ignition system. Might this also be part of the misfire gremlin? clay On May 14, 2013, at 8:44 PM, Jim Cathey wrote: where the sensor/amp lives. No sensor, no amp. It vampires off of the ignition signal. You _need_ a car schematic! There are ones in Haynes, if nowhere else. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
I am beginning to think I need to rewire the car. All the underhood wires are sort of baked and insulation is flaking off. clay On May 15, 2013, at 9:30 AM, Randy Bennell wrote: On 14/05/2013 10:44 PM, Jim Cathey wrote: where the sensor/amp lives. No sensor, no amp. It vampires off of the ignition signal. You _need_ a car schematic! There are ones in Haynes, if nowhere else. -- Jim ___ So, either there is a problem in the wiring which is essentially one wire from the distributor to the tach and a ground (not counting any lighting) or the the tach itself is bad? Make sure the ground is good. Randy ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] Tachometer Amp
Froggy is not behaving. But, then again, since when has she? When I got the car, the tach would swing about wildly in no relation to the engine speed. It would then either pet out or not move at all. Smack the tach face and it might respond. I knew it was either the amp or the gauge, so sourced a fresher gauge. This new one does sort of respond, but not really. It will register only between 1k and 2k rpm, but does move smoothly between them in relation to engine speed. I have poked around the interwebs for a clue as to where the sensor/amp lives. I am finding much about OM617 cars and diesel, but not anything related to a 1974 SL. Does this thing live on the engine or the transmission? And where should I be looking for the critter? clay 1974 450sl - Frosch - Two tone green 1972 220D - Gump - She was green, simple and ran 1995 E300D - Gave her life to save me against a Dame in a SUV POS 1987 SDL - Beware Nigerian Scammers ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
Hmmm, doesn't a gasser tachometer get the engine speed signal from the distributor? -- Max Dillon Charleston, SC '95 E300, '87 300TD, '73 Balboa 20 clay redgh...@comcast.net wrote: Froggy is not behaving. But, then again, since when has she? When I got the car, the tach would swing about wildly in no relation to the engine speed. It would then either pet out or not move at all. Smack the tach face and it might respond. I knew it was either the amp or the gauge, so sourced a fresher gauge. This new one does sort of respond, but not really. It will register only between 1k and 2k rpm, but does move smoothly between them in relation to engine speed. I have poked around the interwebs for a clue as to where the sensor/amp lives. I am finding much about OM617 cars and diesel, but not anything related to a 1974 SL. Does this thing live on the engine or the transmission? And where should I be looking for the critter? clay 1974 450sl - Frosch - Two tone green 1972 220D - Gump - She was green, simple and ran 1995 E300D - Gave her life to save me against a Dame in a SUV POS 1987 SDL - Beware Nigerian Scammers ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
Hm... my first reaction was to say the signal comes from the coil, but its actually different and more complicated. See this: http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/Chassis/54-252.pdf There is a transmission on the transmission, and there are instructions on how to test it. Good luck, Jaime On Tue, May 14, 2013 at 6:19 PM, Max meadedil...@bellsouth.net wrote: Hmmm, doesn't a gasser tachometer get the engine speed signal from the distributor? -- Max Dillon Charleston, SC '95 E300, '87 300TD, '73 Balboa 20 clay redgh...@comcast.net wrote: Froggy is not behaving. But, then again, since when has she? When I got the car, the tach would swing about wildly in no relation to the engine speed. It would then either pet out or not move at all. Smack the tach face and it might respond. I knew it was either the amp or the gauge, so sourced a fresher gauge. This new one does sort of respond, but not really. It will register only between 1k and 2k rpm, but does move smoothly between them in relation to engine speed. I have poked around the interwebs for a clue as to where the sensor/amp lives. I am finding much about OM617 cars and diesel, but not anything related to a 1974 SL. Does this thing live on the engine or the transmission? And where should I be looking for the critter? clay 1974 450sl - Frosch - Two tone green 1972 220D - Gump - She was green, simple and ran 1995 E300D - Gave her life to save me against a Dame in a SUV POS 1987 SDL - Beware Nigerian Scammers ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Jaime Kopchinski http://www.jaimekop.com/ ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
Er, that should read, transmitter on the transmission. Right. On Tue, May 14, 2013 at 7:01 PM, Jaime Kopchinski jaime...@gmail.comwrote: Hm... my first reaction was to say the signal comes from the coil, but its actually different and more complicated. See this: http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/Chassis/54-252.pdf There is a transmission on the transmission, and there are instructions on how to test it. Good luck, Jaime On Tue, May 14, 2013 at 6:19 PM, Max meadedil...@bellsouth.net wrote: Hmmm, doesn't a gasser tachometer get the engine speed signal from the distributor? -- Max Dillon Charleston, SC '95 E300, '87 300TD, '73 Balboa 20 clay redgh...@comcast.net wrote: Froggy is not behaving. But, then again, since when has she? When I got the car, the tach would swing about wildly in no relation to the engine speed. It would then either pet out or not move at all. Smack the tach face and it might respond. I knew it was either the amp or the gauge, so sourced a fresher gauge. This new one does sort of respond, but not really. It will register only between 1k and 2k rpm, but does move smoothly between them in relation to engine speed. I have poked around the interwebs for a clue as to where the sensor/amp lives. I am finding much about OM617 cars and diesel, but not anything related to a 1974 SL. Does this thing live on the engine or the transmission? And where should I be looking for the critter? clay 1974 450sl - Frosch - Two tone green 1972 220D - Gump - She was green, simple and ran 1995 E300D - Gave her life to save me against a Dame in a SUV POS 1987 SDL - Beware Nigerian Scammers ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Jaime Kopchinski http://www.jaimekop.com/ -- Jaime Kopchinski http://www.jaimekop.com/ ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
On Tue, 14 May 2013 19:10:12 -0400 Jaime Kopchinski jaime...@gmail.com wrote: Er, that should read, transmitter on the transmission. Right. That's OK, Jaime, we all have our off days. For me, there have been a lot of them lately. :-) Craig ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
You know, this looks and reads suspiciously like the speedo, not the tach. -Original Message- From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Jaime Kopchinski Sent: Tuesday, May 14, 2013 7:10 PM To: Mercedes Discussion List Subject: Re: [MBZ] Tachometer Amp Er, that should read, transmitter on the transmission. Right. On Tue, May 14, 2013 at 7:01 PM, Jaime Kopchinski jaime...@gmail.comwrote: Hm... my first reaction was to say the signal comes from the coil, but its actually different and more complicated. See this: http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/Chassis/54-252.pdf There is a transmission on the transmission, and there are instructions on how to test it. Good luck, Jaime On Tue, May 14, 2013 at 6:19 PM, Max meadedil...@bellsouth.net wrote: Hmmm, doesn't a gasser tachometer get the engine speed signal from the distributor? -- Max Dillon Charleston, SC '95 E300, '87 300TD, '73 Balboa 20 ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
Supplemental: Since the transducer is near the flex disk, I'm sure it's the transmission output signal (speed) not, engine RPM. Here's an excerpt from a gasser ETM which shows the tach signal coming from the ignition circuit: http://Pt709.synology.me/tach.jpg -Original Message- From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Scott Ritchey Sent: Tuesday, May 14, 2013 8:04 PM To: 'Mercedes Discussion List' Subject: Re: [MBZ] Tachometer Amp You know, this looks and reads suspiciously like the speedo, not the tach. -Original Message- From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Jaime Kopchinski Sent: Tuesday, May 14, 2013 7:10 PM To: Mercedes Discussion List Subject: Re: [MBZ] Tachometer Amp Er, that should read, transmitter on the transmission. Right. On Tue, May 14, 2013 at 7:01 PM, Jaime Kopchinski jaime...@gmail.comwrote: Hm... my first reaction was to say the signal comes from the coil, but its actually different and more complicated. See this: http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/Chassis/54-252.pdf There is a transmission on the transmission, and there are instructions on how to test it. Good luck, Jaime On Tue, May 14, 2013 at 6:19 PM, Max meadedil...@bellsouth.net wrote: Hmmm, doesn't a gasser tachometer get the engine speed signal from the distributor? -- Max Dillon Charleston, SC '95 E300, '87 300TD, '73 Balboa 20 ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
Hm, yes it does. And heres the proof they're talking about the speedo: http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/Chassis/54-259.pdf So, in these old manuals: - Tachometer = Speedometer - Revolution Counter = Tachometer Lets look at this again, this time the ETM: http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/ETM/74etm.pdf Look at page 6 of that PDF file... thats Page 4-3, D22. Looks like the signal from the tach comes right from the breaker points via a green/black wire. Follow that to page 13, which is 4-7 E23, the same green/black wire goes right to the tach. By the way, the index for all these pdfs starts here: http://www.startekinfo.com/StarTek/outside/11883/?requestedDocId=11883 Jaime On Tue, May 14, 2013 at 8:03 PM, Scott Ritchey ritche...@nc.rr.com wrote: You know, this looks and reads suspiciously like the speedo, not the tach. -Original Message- From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Jaime Kopchinski Sent: Tuesday, May 14, 2013 7:10 PM To: Mercedes Discussion List Subject: Re: [MBZ] Tachometer Amp Er, that should read, transmitter on the transmission. Right. On Tue, May 14, 2013 at 7:01 PM, Jaime Kopchinski jaime...@gmail.com wrote: Hm... my first reaction was to say the signal comes from the coil, but its actually different and more complicated. See this: http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/Chassis/54-252.pdf There is a transmission on the transmission, and there are instructions on how to test it. Good luck, Jaime On Tue, May 14, 2013 at 6:19 PM, Max meadedil...@bellsouth.net wrote: Hmmm, doesn't a gasser tachometer get the engine speed signal from the distributor? -- Max Dillon Charleston, SC '95 E300, '87 300TD, '73 Balboa 20 ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Jaime Kopchinski http://www.jaimekop.com/ ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
Thanks guys, learn something everyday! Now hopefully Clay's malfunctioning tachometer will yield and succumb to repair. -- Max Dillon Charleston, SC '95 E300, '87 300TD, '73 Balboa 20 Jaime Kopchinski jaime...@gmail.com wrote: Hm, yes it does. And heres the proof they're talking about the speedo: http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/Chassis/54-259.pdf So, in these old manuals: - Tachometer = Speedometer - Revolution Counter = Tachometer Lets look at this again, this time the ETM: http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/ETM/74etm.pdf Look at page 6 of that PDF file... thats Page 4-3, D22. Looks like the signal from the tach comes right from the breaker points via a green/black wire. Follow that to page 13, which is 4-7 E23, the same green/black wire goes right to the tach. By the way, the index for all these pdfs starts here: http://www.startekinfo.com/StarTek/outside/11883/?requestedDocId=11883 Jaime On Tue, May 14, 2013 at 8:03 PM, Scott Ritchey ritche...@nc.rr.com wrote: You know, this looks and reads suspiciously like the speedo, not the tach. -Original Message- From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Jaime Kopchinski Sent: Tuesday, May 14, 2013 7:10 PM To: Mercedes Discussion List Subject: Re: [MBZ] Tachometer Amp Er, that should read, transmitter on the transmission. Right. On Tue, May 14, 2013 at 7:01 PM, Jaime Kopchinski jaime...@gmail.com wrote: Hm... my first reaction was to say the signal comes from the coil, but its actually different and more complicated. See this: http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/Chassis/54-252.pdf There is a transmission on the transmission, and there are instructions on how to test it. Good luck, Jaime On Tue, May 14, 2013 at 6:19 PM, Max meadedil...@bellsouth.net wrote: Hmmm, doesn't a gasser tachometer get the engine speed signal from the distributor? -- Max Dillon Charleston, SC '95 E300, '87 300TD, '73 Balboa 20 ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer Amp
where the sensor/amp lives. No sensor, no amp. It vampires off of the ignition signal. You _need_ a car schematic! There are ones in Haynes, if nowhere else. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer
The sensor is a coil. IIRC 80 ohm. Check for open or short. On Mon, Jul 11, 2011 at 3:37 PM, Michael Canfield slozuk...@gmail.comwrote: Is there a way to test the crank sensor on my 83 300d? Thanks, Mike On May 11, 2011 12:58 AM, Dieselhead 126die...@gmail.com wrote: If it is not the ground, then the OVP relay is the next suspect. Do you have another car with OVP you can swap? that is the easiest test. It is the way I like to test Klima relays too. Yeah, I know Nobody else's ever fail. But most of my cars with KLIMA relays have had KLIMAs that failed. Jim Cathey wrote: So I guess the '85 drives the tach some other way, 'cause it was working last week. It is different, the tach amp is integrated into something-or-other. But I forget what, you'll have to look. (We don't have any '85 cars.) How's your overvoltage relay (?), and fuses? Overvoltage relay? I don't know... Fuses... *sigh* Too many cars. I'll have to go look at the service records. I don't remember if I changed them all in that car or not. I miss it more in the 240 with the manual transmission, but it never had one, so I've been to lazy to retrofit. The turbo and automatic transmission needs it less - but I still like having it. -- Philip ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- Hans Neureiter, Katy, TX '82 300SD ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer
Is there a way to test the crank sensor on my 83 300d? Thanks, Mike On May 11, 2011 12:58 AM, Dieselhead 126die...@gmail.com wrote: If it is not the ground, then the OVP relay is the next suspect. Do you have another car with OVP you can swap? that is the easiest test. It is the way I like to test Klima relays too. Yeah, I know Nobody else's ever fail. But most of my cars with KLIMA relays have had KLIMAs that failed. Jim Cathey wrote: So I guess the '85 drives the tach some other way, 'cause it was working last week. It is different, the tach amp is integrated into something-or-other. But I forget what, you'll have to look. (We don't have any '85 cars.) How's your overvoltage relay (?), and fuses? Overvoltage relay? I don't know... Fuses... *sigh* Too many cars. I'll have to go look at the service records. I don't remember if I changed them all in that car or not. I miss it more in the 240 with the manual transmission, but it never had one, so I've been to lazy to retrofit. The turbo and automatic transmission needs it less - but I still like having it. -- Philip ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer
Michael Canfield wrote: Is there a way to test the crank sensor on my 83 300d? If you have another W123 with working tach, swap the tach amps. If the tach works with the good amp, the crank sensor works. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer
Already did that. Not even a wiggle but I don't know for sure that one is good. Need to go see if the 78 has one. Mike On Jul 11, 2011 4:41 PM, Mitch Haley m...@voyager.net wrote: Michael Canfield wrote: Is there a way to test the crank sensor on my 83 300d? If you have another W123 with working tach, swap the tach amps. If the tach works with the good amp, the crank sensor works. ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer
So I guess the '85 drives the tach some other way, 'cause it was working last week. It is different, the tach amp is integrated into something-or-other. But I forget what, you'll have to look. (We don't have any '85 cars.) How's your overvoltage relay (?), and fuses? -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer
Jim Cathey wrote: So I guess the '85 drives the tach some other way, 'cause it was working last week. It is different, the tach amp is integrated into something-or-other. But I forget what, you'll have to look. (We don't have any '85 cars.) How's your overvoltage relay (?), and fuses? Overvoltage relay? I don't know... Fuses... *sigh* Too many cars. I'll have to go look at the service records. I don't remember if I changed them all in that car or not. I miss it more in the 240 with the manual transmission, but it never had one, so I've been to lazy to retrofit. The turbo and automatic transmission needs it less - but I still like having it. -- Philip ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Tachometer
If it is not the ground, then the OVP relay is the next suspect. Do you have another car with OVP you can swap? that is the easiest test. It is the way I like to test Klima relays too. Yeah, I know Nobody else's ever fail. But most of my cars with KLIMA relays have had KLIMAs that failed. Jim Cathey wrote: So I guess the '85 drives the tach some other way, 'cause it was working last week. It is different, the tach amp is integrated into something-or-other. But I forget what, you'll have to look. (We don't have any '85 cars.) How's your overvoltage relay (?), and fuses? Overvoltage relay? I don't know... Fuses... *sigh* Too many cars. I'll have to go look at the service records. I don't remember if I changed them all in that car or not. I miss it more in the 240 with the manual transmission, but it never had one, so I've been to lazy to retrofit. The turbo and automatic transmission needs it less - but I still like having it. -- Philip ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] Tachometer
The tach quit on my '85 300TD. I figured, That's easy. Just clean the contacts on the tach amp. But no - the socket on the port (drivers side in the US) inner fender is empty! With a protective cap screwed over the top. So I guess the '85 drives the tach some other way, 'cause it was working last week. Anyone been here before? I probably should just dig out the electrical drawings and trace things down - but I'm lazy so I'm asking here first. *weak grin* -- Philip ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
