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'94 940 AC compressor clutch test 900 1994

posted by  Erwin on  Sun May 5 12:29 CST 2013
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last visit: Thu Oct 23 10:39 CST 2014
[RELATED]

Hi,

Still working with my wife's 945t AC not coming on. The compressor won't engage, even when shorting the pressure switch on the receiver.

There is a single wire on the compressor that leads up to a bullet connector near the intake manifold. Looked like a fuse holder but it's just a connector.

Measuring the compressor end of the wire to ground I get 2.7 Ohms, which could be a solenoid coil. I don't have a proper wiring diagram for this car, apparently '94s were different than earlier.

Using a clip lead to the battery's + terminal doesn't make the compressor clutch engage, key on or off, engine on or off.

Was this a valid test? On the compressor, the wire goes first to something that could be an internal switch, then a shorter lead goes back behind the pulley, which I assume is to energize a clutch solenoid.

Anything else I can try or is this clutch toast?

Thanks,

Erwin in Memphis






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