air con problems

[bwanathefirst]

mmmm checked the pin out on the relay j #5 0 volts from the ecu when air con on so looks like the compressor is not doing the job... only just replaced it from

[bwanathefirst]

mmmm checked the pin 0ut#5 on the j relay 0volts from the ecu so all that side seems ok looks like its the compressor I changed from simply saab Bristol [it was second hand]
well back to the drawing board.. got my old noisy one was working maybe get it overhauled

[bwanathefirst]

hi,
checked the above 0 volts at pin#5 ..swopped relays with dip lights works there so relay ok looking more like compressor??

[9-3 Aero]

Good idea swapping the relays

What you could do, to verify credibility of my advised measurement with regard to grounding of the A/C relay, is to note a raise of voltage measured on pin #5 when compressor is supposed to be off, i.e. when soft top is lowered or (in case you have an ACC) turning "ECON" to "ON" or "A/C" "OFF". This to (hopefully) confirm that use of the multimeter does not impose low impedance on the pin #5, thus fouling up the measurement.

Given you note a voltage on the pin, do I agree with you that it looks like compressor, if the system was filled with refrigerant in accordance with procedure, after the compressor replacement.