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ac comp on 300cd
the ac comp on my 85 300cd is on all the time (clutch engaged), where do I look first? anybody got a wiring diagram for the acc on a 300CD? thanks
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Check the pressure switch on the dryer. The pressure switch is what completes the electrical curcuit for the clutch operation. It could be stuck closed, or some one could have made a jumper for it and left it plugged in. Check the switch for continuity.
There is also a test for the CCU, but I cannot remember what it is. Also with the engine not running, but the key in position 2 (the one just before the starter engages and the glow cycle begins, IIRC), see if you can here the clutch engage and disengage with the key movement. If there is not audible clicking check the clutch clearance gap, and also check for 12 volts at the compressor clutch connector. Check it with the key removed, and in position 2.
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RRGrassi 70's Southern Pacific #5608 Fairmont A-4 MOW car 13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete. 91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K 90 Dodge D250 5.9 Cummins/5 speed. 400K |
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