Forwarded from my sent file. ----- Original Message ----- From: "Harry Watkins" <[EMAIL PROTECTED]> To: "Jim Cathey" <[EMAIL PROTECTED]> Sent: Thursday, July 13, 2006 1:01 PM Subject: Re: [MBZ] Need AC help on 86 SDL
> Jim > > Is the Klima relay the same as the AC relay (Rusty's site) or AC Compressor > Control Unit ( N6) in the FSM? > > I went through 6 or 7 troubleshooting test in the FSM and it says replace > N6. Of course that's not a problem because I have another SDL with a > grenaded compressor, however the socket was empty??? > > The wife needs air tomorrow so Tom is overnighting a unit. > > The tests included checking resistance of speed sensor (passed) and the RPM > signal from the EDS. > > What should the normal readings be with ambiant temp of 92*F? I will take it back to the local shop for a gauge test to check for overcharge. > > If this doesn't fix it, I won't have a spare because of the other SDL. > > I'll know when she gets PTPONR. :>) > > Harry > > > > > and got my money back. While out and about I took it to a local shop > > > for a > > > 124 charge. It turns out to be fully charged but the clutch only stays > > > engaged a few seconds and will engage at each engine reboot. > > > > > > Any suggestions where to start looking? > > > > (I already told you this offline, but for the benefit [?] of > > others...) Overcharged? You need to get the gauges on there > > and watch what's going on when it cuts out. > > > > If the belt protection mechanism is cutting in that kills the > > AC compressor until the next power cycle to the ACC. This can > > be caused by the belt or clutch slipping, which can be caused > > by problems such as overcharge or oil on the clutch. Also, the > > RPM sensor (or its wiring) can be faulty, or the Klima relay. > > It's comparing the engine tach signal to the compressor tach > > signal, so if your engine tach isn't working right you for > > sure could have problems. > > > > -- Jim > > > > >
