Need help with my A/C system
Hello and thanks in advance to everybody who can help! Since I bought my 850 about a year ago, the A/C didn't work (what a surprise). The car was built in 1995 and is equipped with the manual A/C. A friend of mine is a mechanic, and we started diagnosing different things and read through about every forum on the topic. Today I've got the system filled by my local mechanic, and still the compressor clutch won't engage. Below I list everything we tested and is known to be good to us:
-Low pressure switch (jumped it with a wire)
-The Fuses
-Compressor Clutch (Hooked an external power supply to it, and the clutch engaged)
-The two A/C relays (those behind the glovebox)
-The A/C panel switch: the little white light turns on with ignition but not when the engine is running?
-Replaced the high-pressure switch (behind the right headlight - mine has four cables)
-Measured if there was a break in a wire leading to the compressor from the relay and the pressure switches to the ECU - all according to some wiring diagrams we have found online.
That's all we know. Does somebody have a clue what else we could check?