AC Relay is under the hood... - Saab 9000 Bulletin Board - Saabnet.com
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AC Relay is under the hood...
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Posted by Mr. Bubble [Email] (more from Mr. Bubble) on Wed, 11 Jun 2008 06:56:42 Share Post by Email
In Reply to: AC Relay, Go_Bucks [Profile/Gallery] , Tue, 10 Jun 2008 17:33:46
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The AC relay is in the engine bay in the smoked plastic box.

A series of switches (low pressure cutoff, freeze up) can gate off the AC compressor signal.

Keep in mind when testing that the AC is energized not by supplying a voltage to the relay - but by the control system grounding the activation coil. You'll probably see voltage at the control terminal of the relay.

If you put 12V to the clutch control line, and the system starts cooling, the refridge pressure might be too low to allow startup normally.

The system has to be running to add r134 though.

posted by 129.42.16...


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