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Old 09-01-2007, 01:18 PM
UncleBob UncleBob is offline
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Re: 1999 Buick Regal AC problem

unfortunately, you need to sit down with a wiring diagram and trace the power, thats the only way to diagnose electrical problems.

If its a climate-control system, then the computer is involved, which complicates things, and makes it much harder to diagnose.

One common problem is intermittantly bad contacts in the relays. If you haven't tried it already, swap out a relay from something else that uses the same relay (such as the horn relay)
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