Assuming the clutch is not engaging and you probably don't have low/high pressure switch feature as it was not stock:
1) Turn the key on, don't need to start the engine.
2) Turn the left, thermostat, console switch knob to max cold.
Turn the, fan speed, console switch to any fan speed, 1-3.
3) Locate the clutch coil connector, near oil filter, female and male spade terminals usually in translucent rectangular cover. Unplug them. Using either a check light to ground or or a volt meter, check for voltage from the male spade connector by the oil filter. If you have voltage, then use an ohm meter to check the resistance of the clutch coil, check resistance between female spade terminal at clutch and compressor ground, should be around 3.0 ohms nominal, if no resistance or less than 2.25 ohms then your coil wire inside the clutch coil broke or near grounding, if you got a circuit then you have a grounded coil. Most coils fail due to overheating of the compressor (we'll discuss another time).
4) If you don't have any current at the male spade connector by the oil filter then check your ac fuse,
what is it ? # 3 position (you can look that up).
5) If fuse is OK, then you want to check the thermostatic switch,
especially since you said something about working with wires. If the aluminum tube from the left hand switch in the center console leading to the evaporator snapped, the gas escapes the tube, yada yada yada, and won't allow the circuit to complete. Open the center console and locate the two wires connecting to the left hand switch. With the key on and right hand knob turned to fan speed 1,2 or 3, cheat a little here and jump the two female spades on the back of the thermostatic switch listen to hear if the clutch makes and breaks.
We'll stop here for the moment.
Quote:
Originally posted by vesnyder
Jim - Thanks for the info, and provide me updates as you debug - sounds like the same issue. The compressor clutch is not engaging. It all started when I placed a light into the switch to see if it is on or not? I iwll check the three culprits you outlined and will let you know if I find anything.
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