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940 TURBO AIR CONDITIONING 900 1994

posted by  dakinecar on  Sat Apr 20 13:48 CST 2002
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Thanks. I did this. Compressor did not come on.

I separated the connector just above and aft of the compressor in the clip to the engine block and measured resistance to ground and control voltage. The lead going to the compressor measured 0Kohms. I assume this is normal because it runs to ground thru the clutch coil. Is that correct?

The voltage on the other end varied curiously. When the A/C button inside the car was pressed, voltage rose slowly to about 6.5VDC, then hung out a while before increasing to ~10.5VDC. I made sure I had good contact with the voltmeter leads. Is that normal?

It could be that there is a ground around the compressor. What is that circular thing attached to the top of the compressor with a little screwed-down clamp; the one with the compressor lead going into it then reemerging to go to the clutch? Can I take it loose and further localize where the lead may be grounded? Since it appears voltage is making it to the clutch coil, what else might cause the thing to not engage?

Is it cost effective to replace a clutch assembly and not the whole compressor (130K miles)?

Thanks in advance for bearing thru all this.





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