The Moogs Motor Is Unwell

[TheMoog]

Hi All,

 

We've had the Galaxy now for 6 or so years and generally it's been pretty good. But the last couple of years have been painful. DMF replaced, then drive shaft, front suspensions bits, plus new air con pipes, wheel bearing and alternator pully.

 

wife and kids love it and so does the dog....

 

Now the air con has packed up :-). I'm loath to spend more cash on it at the moment until I have exhausted all the things I can try myself.

 

Few more details, it's got climate control, dual front and rear air con and one single radiator fan.

 

My notes and investigations so far:

1)Compressor is not spinning up when the air con is turned on

2)compressor clutch spins freely so don't think the compressor is seized

3)tested the voltage on the plug to the compressor and that's 0v, aircon on or not,

4) confirmed there is pressure in the system, checked by quick fit and also no diagnostic codes for low or high pressure on vcds lite.

5) no fault codes found on vcds lite at all, apart from the faulty glowplUg on the aux heater which I know about

6) turn the air con on (auto setting) and the radiator fan does not spin up. Reduced the cabin temp,setting to make sure there is demand and still no change.

7) external temp reading on the dash and climate control panel look to indicate the external temp sensor is working (17c) today when testing

8) checked all the fuses in the engine fuse box. All ok.

9) checked all the fuses in passenger fuse box. All ok

10) pulled the plug on the radiator fan and both 12v supply and 0v ground were good. Both yellow wire and yellow/black wire were 0v with engine off. Start the engine and yellow wire still 0v but yellow/black went to 12v. Did not change state when air con on or off.

11) refitted plug and check for fault codes and correctly picked up cooling fan1 error which i cleared.

12) started the engine and idled for ages to get the coolant temp up to about 75c and the fan spun a bit but not what I would call at full speed.

 

Right now I am kind of stuck without a proper circuit diagram.

 

Any suggestions on what to try next?

 

Thanks for reading all that.

 

Cheers,

 

Ed

[gregers]

welcome to the forum,

im sure someone might be able to point you in the right direction.

[TheMoog]

Thanks Gregers,

 

I've been a longtime lurker and normally able to find the answer by just searching, but I am stumped :-).

[TheMoog]

Looks like I can now  start a thread in the Mk1 & Mk2 technical section so I'll carry this on over there.

Thanks.