Problem with the A/C pump.
It wouldnt turn on... but it would turn on if I fed it power directly....
Thought it was a problem with the ECU, but then I plugged in another ECU and it was still not working...

Any idea on what is wrong?
Where to start checking?

 

Check your underhood fuse box for the AC relay. If it's firing up after being hardwired, chances are, your relay is not working.

Oh, also check your refrigerant level, i think there is sensor to disable thr AC compressor if it's low.

 

OK, will check...
thanks

 

yeah, more than likely the relay, the pressure switch does not go bad very often.

 

Checked the relay...
The relay is fine...
How to check the pressure switch? or any other suggestions?

Cheers..