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Air Conditioning and charging system Troubleshooting 700 1991

posted by  Rule 308 on  Wed Apr 19 03:52 CST 2006
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last visit: Tue May 8 09:20 CST 2012
[RELATED]

You may have other problems but at the very least you will need to put the cluster back in so that the alternator will charge and the A/C control head will see the voltage at the D+ wire on the alternator and energize the compressor. Back in the day we used and "a/c delay relay" to pull the compressor on 10 seconds after it saw the D+ hot up the alternator. That feature is built into the control heads now but it still needs to see that signal and that signal comes through the instrument cluster. Hook it all back up properly and see if it works, if not then you have yet another problem.

Mark






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