Re: [MBZ] AC and alternators?

[Jim Cathey]

I thought you were trying to come up with the name of the gizmo on the 
compressor.  I can't remember its name.


Tachometer.

-- Jim



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Re: [MBZ] AC and alternators?

[M. Mitchell Marmel]

At 9:50 AM -0400 7/12/13, Rich Thomas wrote:

Cheepchineechit meter for cars


http://dx.com/p/mini-digital-blue-red-led-dc-current-meter-voltmeter-w-ampere-shunt-219592?utm_source=dx&utm_medium=edm&utm_campaign=20130711updatenewarrivals

What self-respecting Benz owner is gonna mount THAT on the dash?  ;)

I'm also wondering how the ammeter measures a double digit negative reading.

For four bucks more, I'll stick with the Walleyworld gizmo what you 
can put in the cigarette lighter.  :D


-MMM-

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Re: [MBZ] AC and alternators?

[Alex Chamberlain]

On Fri, Jul 12, 2013 at 6:50 AM, Rich Thomas <
richthomas79td...@constructivity.net> wrote:

> Cheepchineechit meter for cars
>
> https://edm.tradeglobals.com:**2445/Tracking/ClickLink?ID=**
> fd7cd337-b26a-4fca-988b-**a9f0e65562c2&url=http://e.dx.**
> com/collection/201307/new-**arrivals/defaul.html
>
>
Awesome.  I totally need that for my motorcycle, along with the backup
camera I've already installed next to the license plate to give me an extra
rear-view "mirror."

Alex
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Re: [MBZ] AC and alternators?

[Scott Ritchey]

I have a voltmeter very similar to the one from Wal-Mart.  I observe that it
is not particularly accurate and the reading is off by a good bit if the
meter is hot (like sitting in a closed car).  Still, it's convenient.

> > MMM wrote:
> >
> > I use one of these widgets:
> > 
>
> http://www.walmart.com/ip/Equus-Innova-3721-Battery-and-Charging-System-Mo
nitor/15137663

> Curt wrote:
> 
stinfo/mercedes_okiebenz.com



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Re: [MBZ] AC and alternators?

[Rich Thomas]

Cheepchineechit meter for cars

https://edm.tradeglobals.com:2445/Tracking/ClickLink?ID=fd7cd337-b26a-4fca-988b-a9f0e65562c2&url=http://e.dx.com/collection/201307/new-arrivals/defaul.html

Mini Digital Blue + Red LED DC Current Meter Voltmeter w/ Ampere Shunt
-Material: Plastic
-Quantity: 1 piece per pack
- Application: For automotive/ motorcycles battery monitoring or other 
products voltage current measurement

$12.10



--R
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Re: [MBZ] AC and alternators?

[Curt Raymond]

Yeahbut with my plan I'll have the ability to take this setup to any car at any 
time just by pulling the adapter and moving to a different car.

The insides of the adapter are really simple, theres a circuit board with 2 
wires that go to the inputs. I cut the circuit board out and will crimp butt 
connectors onto the two wires. The butt connectors fit my DMM's probes 
perfectly.

I'd already considered the 5v problem...

-Curt 

Date: Thu, 11 Jul 2013 22:26:58 -0500
From: Fmiser 
To: mercedes@okiebenz.com
Subject: Re: [MBZ] AC and alternators?
Message-ID: <20130711222658.4ffb4...@jasper.condray.lan>
Content-Type: text/plain; charset=US-ASCII

> > > Curt Raymond wrote:
> > > 
> > > Sounds like a VR to me, I've got a spare, I'll give it a
> > > shot.  I'm also going to gut an old 12v cellphone
> > > charger to make test ports I can easily plug my
> > > multimeter into for realtime monitoring.

> > MMM wrote:
> >
> > I use one of these widgets:
> > 
> > 
> >http://www.walmart.com/ip/Equus-Innova-3721-Battery-and-Charging-System-Monitor/15137663

> Curt wrote:
> 
> Yeahbut if I can cut apart an old phone charger and make one
> thats $17 in my pocket...

You're just looking for a way to connect your existing DMM to
monitor the voltage?  _Any_ +12 on the car will work.  There
are numerous places to tap on any of my cars - but mine are
W123s, so your car may be different.

I guess you're planning to just use the lighter plug from the
'phone changer?  Make sure you bypass or removed the voltage
regulator stuff or you'll worry yourself. *grin*

--    Philip, imagining Curt's reaction when his meter reads
      5.0 VDC.
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Re: [MBZ] AC and alternators?

[Fmiser]

> > > Curt Raymond wrote:
> > > 
> > > Sounds like a VR to me, I've got a spare, I'll give it a
> > > shot.  I'm also going to gut an old 12v cellphone
> > > charger to make test ports I can easily plug my
> > > multimeter into for realtime monitoring.

> > MMM wrote:
> >
> > I use one of these widgets:
> > 
> > http://www.walmart.com/ip/Equus-Innova-3721-Battery-and-Charging-System-Monitor/15137663

> Curt wrote:
> 
> Yeahbut if I can cut apart an old phone charger and make one
> thats $17 in my pocket...

You're just looking for a way to connect your existing DMM to
monitor the voltage?  _Any_ +12 on the car will work.  There
are numerous places to tap on any of my cars - but mine are
W123s, so your car may be different.

I guess you're planning to just use the lighter plug from the
'phone changer?  Make sure you bypass or removed the voltage
regulator stuff or you'll worry yourself. *grin*

--Philip, imagining Curt's reaction when his meter reads
  5.0 VDC.

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Re: [MBZ] AC and alternators?

[Curt Raymond]

Yeahbut if I can cut apart an old phone charger and make one thats $17 in my 
pocket...

-Curt

Date: Thu, 11 Jul 2013 11:49:31 -0500
From: "M. Mitchell Marmel" 
To: Mercedes Discussion List 
Subject: Re: [MBZ] AC and alternators?
Message-ID: 
Content-Type: text/plain; charset="us-ascii" ; format="flowed"

At 4:17 PM -0700 7/10/13, Curt Raymond wrote:

>Sounds like a VR to me, I've got a spare, I'll give it a shot. I'm 
>also going to gut an old 12v cellphone charger to make test ports I 
>can easily plug my multimeter into for realtime monitoring.

I use one of these widgets:

http://www.walmart.com/ip/Equus-Innova-3721-Battery-and-Charging-System-Monitor/15137663

Does the job nicely!

-MMM-
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Re: [MBZ] AC and alternators?

[M. Mitchell Marmel]

At 4:17 PM -0700 7/10/13, Curt Raymond wrote:

Sounds like a VR to me, I've got a spare, I'll give it a shot. I'm 
also going to gut an old 12v cellphone charger to make test ports I 
can easily plug my multimeter into for realtime monitoring.


I use one of these widgets:

http://www.walmart.com/ip/Equus-Innova-3721-Battery-and-Charging-System-Monitor/15137663

Does the job nicely!

-MMM-

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Re: [MBZ] AC and alternators?

[Dieselhead]

I thought the gizmo on the compressor just reports compressor RPM, which
the KLIMA compares to what it expects the compressor RPM to be, and shuts
off the compressor if the numbers don't match.


On Wed, Jul 10, 2013 at 11:01 PM, Dieselhead <126die...@gmail.com> wrote:



 KLIMA relay shuts off the power, but there is a gizmo on the compressor
 that detects slip to signal the Klima.  I thought you were trying to come
 up with the name of the gizmo on the compressor.  I can't remember its name.





--
OK Don
2013 F150, 19 mpg
2012 Passat TDI DSG, 45 mpg
1957 C182A, 12 mpg - but at 150 mph!
_


Yes, that is how it works.

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Re: [MBZ] AC and alternators?

[WILTON]

Yep; KLIMA; that's it!

Wilton

- Original Message - 
From: "OK Don" 

To: "Mercedes Discussion List" 
Sent: Wednesday, July 10, 2013 11:46 PM
Subject: Re: [MBZ] AC and alternators?



I agree, it's time to replace the VR, and clean the commutator while you're
there.
I finally rememembered the name of the thing that turns off the AC if the
serpentine belts slips - the KLIMA relay - if anyone cares.


On Wed, Jul 10, 2013 at 9:32 PM, Scott Ritchey  
wrote:




When mt 79 TD had these symptoms it was indeed the VR (putting out too 
much

voltage).

-Original Message-
From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Curt
Raymond
Sent: Wednesday, July 10, 2013 7:17 PM
To: Diesel List
Subject: Re: [MBZ] AC and alternators?

Ga, spoke too soon.

Interestingly the light almost never comes on at idle. The higher the
engine
speed the brighter the light gets. Using more devices (headlights, fan,
wipers like in the massive rainstorm I hit on the way home) makes it come
on
brighter.

Sounds like a VR to me, I've got a spare, I'll give it a shot. I'm also
going to gut an old 12v cellphone charger to make test ports I can easily
plug my multimeter into for realtime monitoring.

-Curt





--
OK Don
2013 F150, 19 mpg
2012 Passat TDI DSG, 45 mpg
1957 C182A, 12 mpg - but at 150 mph!
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Re: [MBZ] AC and alternators?

[Alex Chamberlain]

On Jul 10, 2013 9:16 PM, "OK Don"  wrote:
>
> I thought the gizmo on the compressor just reports compressor RPM, which
> the KLIMA compares to what it expects the compressor RPM to be, and shuts
> off the compressor if the numbers don't match.
>

That is correct, at least for the 124.  If you go through the
troubleshooting procedure in the FSM, you can read the speed signal on a
VOM across two pins in the KLIMA socket and verify that itto correctly
reflects compressor clutch behavior.

Alex
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Re: [MBZ] AC and alternators?

[OK Don]

I thought the gizmo on the compressor just reports compressor RPM, which
the KLIMA compares to what it expects the compressor RPM to be, and shuts
off the compressor if the numbers don't match.


On Wed, Jul 10, 2013 at 11:01 PM, Dieselhead <126die...@gmail.com> wrote:

>
> KLIMA relay shuts off the power, but there is a gizmo on the compressor
> that detects slip to signal the Klima.  I thought you were trying to come
> up with the name of the gizmo on the compressor.  I can't remember its name.
>
>


-- 
OK Don
2013 F150, 19 mpg
2012 Passat TDI DSG, 45 mpg
1957 C182A, 12 mpg - but at 150 mph!
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Re: [MBZ] AC and alternators?

[Dieselhead]

I agree, it's time to replace the VR, and clean the commutator while you're
there.
I finally rememembered the name of the thing that turns off the AC if the
serpentine belts slips - the KLIMA relay - if anyone cares.


KLIMA relay shuts off the power, but there is a gizmo on the 
compressor that detects slip to signal the Klima.  I thought you were 
trying to come up with the name of the gizmo on the compressor.  I 
can't remember its name.


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Re: [MBZ] AC and alternators?

[OK Don]

I agree, it's time to replace the VR, and clean the commutator while you're
there.
I finally rememembered the name of the thing that turns off the AC if the
serpentine belts slips - the KLIMA relay - if anyone cares.


On Wed, Jul 10, 2013 at 9:32 PM, Scott Ritchey  wrote:

>
> When mt 79 TD had these symptoms it was indeed the VR (putting out too much
> voltage).
>
> -Original Message-
> From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Curt
> Raymond
> Sent: Wednesday, July 10, 2013 7:17 PM
> To: Diesel List
> Subject: Re: [MBZ] AC and alternators?
>
> Ga, spoke too soon.
>
> Interestingly the light almost never comes on at idle. The higher the
> engine
> speed the brighter the light gets. Using more devices (headlights, fan,
> wipers like in the massive rainstorm I hit on the way home) makes it come
> on
> brighter.
>
> Sounds like a VR to me, I've got a spare, I'll give it a shot. I'm also
> going to gut an old 12v cellphone charger to make test ports I can easily
> plug my multimeter into for realtime monitoring.
>
> -Curt
>
>


-- 
OK Don
2013 F150, 19 mpg
2012 Passat TDI DSG, 45 mpg
1957 C182A, 12 mpg - but at 150 mph!
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Re: [MBZ] AC and alternators?

[Scott Ritchey]

When mt 79 TD had these symptoms it was indeed the VR (putting out too much
voltage).

-Original Message-
From: Mercedes [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Curt
Raymond
Sent: Wednesday, July 10, 2013 7:17 PM
To: Diesel List
Subject: Re: [MBZ] AC and alternators?

Ga, spoke too soon.

Interestingly the light almost never comes on at idle. The higher the engine
speed the brighter the light gets. Using more devices (headlights, fan,
wipers like in the massive rainstorm I hit on the way home) makes it come on
brighter.

Sounds like a VR to me, I've got a spare, I'll give it a shot. I'm also
going to gut an old 12v cellphone charger to make test ports I can easily
plug my multimeter into for realtime monitoring.

-Curt



 From: Curt Raymond 
To: Diesel List  
Sent: Tuesday, July 9, 2013 7:33 PM
Subject: Re: [MBZ] AC and alternators?
 


Mission accomplished, a remarkably bright (for an Autozone employee)
Autozone employee hooked me up with an H8 gold top Duralast ($5 more than
the red top and 1000cca instead of 900). The H8 apparently replaces the
group 49 and it even says so on the battery itself.
Fit perfectly, does the job, no more alternator light...

-Curt



 From: Curt Raymond 
To: Diesel List  
Sent: Monday, July 8, 2013 9:28 PM
Subject: Re: [MBZ] AC and alternators?
 


That nicely matches my theory and fits with why it takes a minute or so for
the light to go out. I've got another battery (which is now that I think of
it around 8 years old) I was thinking of putting in but I guess I should
just bite the bullet and put in a new one before this one eats the
alternator.

-Curt

Date: Mon, 8 Jul 2013 16:13:59 -0700
From: G Mann 
To: Mercedes Discussion List 
Subject: Re: [MBZ] AC and alternators?
Message-ID:
    
Content-Type: text/plain; charset=ISO-8859-1

If you put a load tester on the old battery, I'm betting it will show it is
no longer capable of holding full charge when under load.  Max AC puts load
on battery, battery discharge rate is greater than it's now able to intake
and hold charge, Alt output from regulator increases to try to make up the
shortage = Alt light comes on.

Suggestion: Drop by your local FLAPS and ask them for a charging system
check... most will do it free and are equipped to do so.  Load test
battery, and load test alternator with AC on engine running. [be ready for
a new battery, I'm betting].

Good luck,
Grant...
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Re: [MBZ] AC and alternators?

[Curt Raymond]

Ga, spoke too soon.

Interestingly the light almost never comes on at idle. The higher the engine 
speed the brighter the light gets. Using more devices (headlights, fan, wipers 
like in the massive rainstorm I hit on the way home) makes it come on brighter.

Sounds like a VR to me, I've got a spare, I'll give it a shot. I'm also going 
to gut an old 12v cellphone charger to make test ports I can easily plug my 
multimeter into for realtime monitoring.

-Curt



 From: Curt Raymond 
To: Diesel List  
Sent: Tuesday, July 9, 2013 7:33 PM
Subject: Re: [MBZ] AC and alternators?
 


Mission accomplished, a remarkably bright (for an Autozone employee) Autozone 
employee hooked me up with an H8 gold top Duralast ($5 more than the red top 
and 1000cca instead of 900). The H8 apparently replaces the group 49 and it 
even says so on the battery itself.
Fit perfectly, does the job, no more alternator light...

-Curt



 From: Curt Raymond 
To: Diesel List  
Sent: Monday, July 8, 2013 9:28 PM
Subject: Re: [MBZ] AC and alternators?
 


That nicely matches my theory and fits with why it takes a minute or so for the 
light to go out. I've got another battery (which is now that I think of it 
around 8 years old) I was thinking of putting in but I guess I should just bite 
the bullet and put in a new one before this one eats the alternator.

-Curt

Date: Mon, 8 Jul 2013 16:13:59 -0700
From: G Mann 
To: Mercedes Discussion List 
Subject: Re: [MBZ] AC and alternators?
Message-ID:
    
Content-Type: text/plain; charset=ISO-8859-1

If you put a load tester on the old battery, I'm betting it will show it is
no longer capable of holding full charge when under load.  Max AC puts load
on battery, battery discharge rate is greater than it's now able to intake
and hold charge, Alt output from regulator increases to try to make up the
shortage = Alt light comes on.

Suggestion: Drop by your local FLAPS and ask them for a charging system
check... most will do it free and are equipped to do so.  Load test
battery, and load test alternator with AC on engine running. [be ready for
a new battery, I'm betting].

Good luck,
Grant...
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Re: [MBZ] AC and alternators?

[Dieselhead]

Mission accomplished, a remarkably bright (for an Autozone employee) 
Autozone employee hooked me up with an H8 gold top Duralast ($5 more 
than the red top and 1000cca instead of 900). The H8 apparently 
replaces the group 49 and it even says so on the battery itself.

Fit perfectly, does the job, no more alternator light...

-Curt


Mine sez 49H8   I have no idea what the H8 means, but the 49 
indicates that it is indeed a group 49.  there is another group 
90-something  (93?) that has the same outside dimensions.  My 
question to them is IF they are the same size, why a different group 
number?  Nobody could answer that for me.


I have one of them in the cheaper line also.

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Re: [MBZ] AC and alternators?

[Curt Raymond]

I asked about a group 49 and then ranted a little when the nearest one was 20 
miles away. I mentioned they didn't have M1 5w40 again and he looked kind of 
lost until I mentioned its "Turbo Diesel Truck" when he perked right up "Oh 
yeah, we moved it!"
Indeed they had, over in the diesel oil area to the right of the main oil area 
they had gallon jugs of our beloved M1 5w40 for $29.99 which while its not as 
good as the 5qt price at el-mercado de wall still isn't all that bad.

It was on the way back to the register that he remembered about the H8.

-Curt

Date: Tue, 9 Jul 2013 20:12:53 -0400
From: Dwight Giles 
To: Mercedes Discussion List 
Subject: Re: [MBZ] AC and alternators?
Message-ID:
    
Content-Type: text/plain; charset=ISO-8859-1

Attaboy. Good to know about group 49 replacement.

On Tuesday, July 9, 2013, Curt Raymond  wrote:
> Mission accomplished, a remarkably bright (for an Autozone employee)
Autozone employee hooked me up with an H8 gold top Duralast ($5 more than
the red top and 1000cca instead of 900). The H8 apparently replaces the
group 49 and it even says so on the battery itself.
> Fit perfectly, does the job, no more alternator light...
>
> -Curt
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Re: [MBZ] AC and alternators?

[Dwight Giles]

Attaboy. Good to know about group 49 replacement.

On Tuesday, July 9, 2013, Curt Raymond  wrote:
> Mission accomplished, a remarkably bright (for an Autozone employee)
Autozone employee hooked me up with an H8 gold top Duralast ($5 more than
the red top and 1000cca instead of 900). The H8 apparently replaces the
group 49 and it even says so on the battery itself.
> Fit perfectly, does the job, no more alternator light...
>
> -Curt
>
>
> 
>  From: Curt Raymond 
> To: Diesel List 
> Sent: Monday, July 8, 2013 9:28 PM
> Subject: Re: [MBZ] AC and alternators?
>
>
>
> That nicely matches my theory and fits with why it takes a minute or so
for the light to go out. I've got another battery (which is now that I
think of it around 8 years old) I was thinking of putting in but I guess I
should just bite the bullet and put in a new one before this one eats the
alternator.
>
> -Curt
>
> Date: Mon, 8 Jul 2013 16:13:59 -0700
> From: G Mann 
> To: Mercedes Discussion List 
> Subject: Re: [MBZ] AC and alternators?
> Message-ID:
> 
> Content-Type: text/plain; charset=ISO-8859-1
>
> If you put a load tester on the old battery, I'm betting it will show it
is
> no longer capable of holding full charge when under load.  Max AC puts
load
> on battery, battery discharge rate is greater than it's now able to intake
> and hold charge, Alt output from regulator increases to try to make up the
> shortage = Alt light comes on.
>
> Suggestion: Drop by your local FLAPS and ask them for a charging system
> check... most will do it free and are equipped to do so.  Load test
> battery, and load test alternator with AC on engine running. [be ready for
> a new battery, I'm betting].
>
> Good luck,
> Grant...
> ___
> http://www.okiebenz.com
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Re: [MBZ] AC and alternators?

[Curt Raymond]

Mission accomplished, a remarkably bright (for an Autozone employee) Autozone 
employee hooked me up with an H8 gold top Duralast ($5 more than the red top 
and 1000cca instead of 900). The H8 apparently replaces the group 49 and it 
even says so on the battery itself.
Fit perfectly, does the job, no more alternator light...

-Curt



 From: Curt Raymond 
To: Diesel List  
Sent: Monday, July 8, 2013 9:28 PM
Subject: Re: [MBZ] AC and alternators?
 


That nicely matches my theory and fits with why it takes a minute or so for the 
light to go out. I've got another battery (which is now that I think of it 
around 8 years old) I was thinking of putting in but I guess I should just bite 
the bullet and put in a new one before this one eats the alternator.

-Curt

Date: Mon, 8 Jul 2013 16:13:59 -0700
From: G Mann 
To: Mercedes Discussion List 
Subject: Re: [MBZ] AC and alternators?
Message-ID:
    
Content-Type: text/plain; charset=ISO-8859-1

If you put a load tester on the old battery, I'm betting it will show it is
no longer capable of holding full charge when under load.  Max AC puts load
on battery, battery discharge rate is greater than it's now able to intake
and hold charge, Alt output from regulator increases to try to make up the
shortage = Alt light comes on.

Suggestion: Drop by your local FLAPS and ask them for a charging system
check... most will do it free and are equipped to do so.  Load test
battery, and load test alternator with AC on engine running. [be ready for
a new battery, I'm betting].

Good luck,
Grant...
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Re: [MBZ] AC and alternators?

[Craig]

On Mon, 8 Jul 2013 19:22:43 -0500 OK Don  wrote:

> Wouldn't the gizmo whose name I'm forgetting shut off the AC if the
> belt is slipping? Should be on all the serpentine belt cars.
> 
> 
> On Mon, Jul 8, 2013 at 6:42 PM, Fmiser  wrote:
> 
> > Could also be a slipping belt.

Yes, there is supposed to be a gizmo (technical term) that shuts off the
A/C when the compressor is not turning the same speed as the rest of the
engine so a locked-up compressor doesn't take out the serpentine belt.


Craig

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Re: [MBZ] AC and alternators?

[Fmiser]

> > On Mon, Jul 8, 2013 at 6:42 PM, Fmiser  wrote:
> >
> > Could also be a slipping belt.

> OK wrote:
> 
> Wouldn't the gizmo whose name I'm forgetting shut off the AC if
> the belt is slipping? Should be on all the serpentine belt cars.

Ah.  On a 190D.  I missed that first time through.  I don't have
any experience with those...

--   Philip

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Re: [MBZ] AC and alternators?

[WILTON]

Bite the bullet.

Wilton

- Original Message - 
From: "Curt Raymond" 

To: "Diesel List" 
Sent: Monday, July 08, 2013 9:28 PM
Subject: Re: [MBZ] AC and alternators?


That nicely matches my theory and fits with why it takes a minute or so for 
the light to go out. I've got another battery (which is now that I think of 
it around 8 years old) I was thinking of putting in but I guess I should 
just bite the bullet and put in a new one before this one eats the 
alternator.


-Curt

Date: Mon, 8 Jul 2013 16:13:59 -0700
From: G Mann 
To: Mercedes Discussion List 
Subject: Re: [MBZ] AC and alternators?
Message-ID:

Content-Type: text/plain; charset=ISO-8859-1

If you put a load tester on the old battery, I'm betting it will show it is
no longer capable of holding full charge when under load. Max AC puts load
on battery, battery discharge rate is greater than it's now able to intake
and hold charge, Alt output from regulator increases to try to make up the
shortage = Alt light comes on.

Suggestion: Drop by your local FLAPS and ask them for a charging system
check... most will do it free and are equipped to do so. Load test
battery, and load test alternator with AC on engine running. [be ready for
a new battery, I'm betting].

Good luck,
Grant...
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Re: [MBZ] AC and alternators?

[Curt Raymond]

Which ought to have an attendant screech shouldn't it?

Remember this is a 190D, serpentine belt. Belt is quite new, maybe 6 mo. old.

-Curt

Date: Mon, 8 Jul 2013 18:42:00 -0500
From: Fmiser 
To: mercedes@okiebenz.com
Subject: Re: [MBZ] AC and alternators?
Message-ID: <20130708184200.7b853...@jasper.condray.lan>
Content-Type: text/plain; charset=US-ASCII

> Peter wrote:
> 
> How old is the battery?  Since you don't have an ammeter (which
> I greatly prefer over an idiot light) it's hard to tell, but I
> suspect you are drawing lots of amps all the time charging a
> battery that's dead.  When the aux fan kicks in you don't have
> enough juice.

Could also be a slipping belt.

--  Philip 
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Re: [MBZ] AC and alternators?

[Curt Raymond]

That nicely matches my theory and fits with why it takes a minute or so for the 
light to go out. I've got another battery (which is now that I think of it 
around 8 years old) I was thinking of putting in but I guess I should just bite 
the bullet and put in a new one before this one eats the alternator.

-Curt

Date: Mon, 8 Jul 2013 16:13:59 -0700
From: G Mann 
To: Mercedes Discussion List 
Subject: Re: [MBZ] AC and alternators?
Message-ID:
    
Content-Type: text/plain; charset=ISO-8859-1

If you put a load tester on the old battery, I'm betting it will show it is
no longer capable of holding full charge when under load.  Max AC puts load
on battery, battery discharge rate is greater than it's now able to intake
and hold charge, Alt output from regulator increases to try to make up the
shortage = Alt light comes on.

Suggestion: Drop by your local FLAPS and ask them for a charging system
check... most will do it free and are equipped to do so.  Load test
battery, and load test alternator with AC on engine running. [be ready for
a new battery, I'm betting].

Good luck,
Grant...
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Re: [MBZ] AC and alternators?

[OK Don]

Wouldn't the gizmo whose name I'm forgetting shut off the AC if the belt is
slipping? Should be on all the serpentine belt cars.


On Mon, Jul 8, 2013 at 6:42 PM, Fmiser  wrote:

> Could also be a slipping belt.
>
> --   Philip
>
>


-- 
OK Don
2013 F150, 19 mpg
2012 Passat TDI DSG, 45 mpg
1957 C182A, 12 mpg - but at 150 mph!
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Re: [MBZ] AC and alternators?

[Fmiser]

> Peter wrote:
> 
> How old is the battery?  Since you don't have an ammeter (which
> I greatly prefer over an idiot light) it's hard to tell, but I
> suspect you are drawing lots of amps all the time charging a
> battery that's dead.  When the aux fan kicks in you don't have
> enough juice.

Could also be a slipping belt.

--   Philip 

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Re: [MBZ] AC and alternators?

[G Mann]

If you put a load tester on the old battery, I'm betting it will show it is
no longer capable of holding full charge when under load.  Max AC puts load
on battery, battery discharge rate is greater than it's now able to intake
and hold charge, Alt output from regulator increases to try to make up the
shortage = Alt light comes on.

Suggestion: Drop by your local FLAPS and ask them for a charging system
check... most will do it free and are equipped to do so.  Load test
battery, and load test alternator with AC on engine running. [be ready for
a new battery, I'm betting].

Good luck,
Grant...

On Mon, Jul 8, 2013 at 10:23 AM, Curt Raymond  wrote:

> I hate to disrupt the airplane theorizing but I've got a car question.
>
> Friday I noticed that if I had the AC on ('84 190D) the alternator light
> would glow on my car. If I turned the AC off the light would dim and after
> a couple minutes would go out completely.
> Its pretty hot here (80F when I got to work at 8:30am) so I'd like to use
> the AC. The alternator is relatively new (February?) but the battery is
> quite old. Is it possible an old battery would cause this?
>
> Years ago my '83 240D ate 3 or 4 alternators before I finally replaced the
> battery (which was on its last legs) and it never had another failure until
> the engine died of a broken oil cooler line. I'm wondering if its the same
> thing here. The car starts fine but its an easy starting 197,000 engine...
>
> -Curt
> ___
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>
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> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
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Re: [MBZ] AC and alternators?

[Peter Frederick]

How old is the battery?  Since you don't have an ammeter (which I  
greatly prefer over an idiot light) it's hard to tell, but I suspect  
you are drawing lots of amps all the time charging a battery that's  
dead.  When the aux fan kicks in you don't have enough juice.


Might check the aux fan too -- if it's running slow due to imminent  
death, it can pull way too much juice too.


Also possible you have bad diodes in the alternator, resulting in low  
output.


Time to take it somewhere and let them check the charging and current  
draw.


Peter

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Re: [MBZ] AC and alternators?

[Michael Canfield]

Bad battery or loose or dirty terminals.

Mike
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Re: [MBZ] AC and alternators?

[Frederick Moir]

Voltages under various conditions?
 
Fred Moir
Lynn MA
Diesel preferred.


>
> From: Curt Raymond 
>To: Diesel List  
>Sent: Monday, July 8, 2013 1:23 PM
>Subject: [MBZ] AC and alternators?
> 
>
>I hate to disrupt the airplane theorizing but I've got a car question.
>
>Friday I noticed that if I had the AC on ('84 190D) the alternator light would 
>glow on my car. If I turned the AC off the light would dim and after a couple 
>minutes would go out completely.
>Its pretty hot here (80F when I got to work at 8:30am) so I'd like to use the 
>AC. The alternator is relatively new (February?) but the battery is quite old. 
>Is it possible an old battery would cause this?
>
>Years ago my '83 240D ate 3 or 4 alternators before I finally replaced the 
>battery (which was on its last legs) and it never had another failure until 
>the engine died of a broken oil cooler line. I'm wondering if its the same 
>thing here. The car starts fine but its an easy starting 197,000 engine...
>
>-Curt
>
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[MBZ] AC and alternators?

[Curt Raymond]

I hate to disrupt the airplane theorizing but I've got a car question.

Friday I noticed that if I had the AC on ('84 190D) the alternator light would 
glow on my car. If I turned the AC off the light would dim and after a couple 
minutes would go out completely.
Its pretty hot here (80F when I got to work at 8:30am) so I'd like to use the 
AC. The alternator is relatively new (February?) but the battery is quite old. 
Is it possible an old battery would cause this?

Years ago my '83 240D ate 3 or 4 alternators before I finally replaced the 
battery (which was on its last legs) and it never had another failure until the 
engine died of a broken oil cooler line. I'm wondering if its the same thing 
here. The car starts fine but its an easy starting 197,000 engine...

-Curt
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