Quote:
Originally Posted by Bev
I haven't changed anything related to the lights, I put a new sanden compressor in last fall. That is the only changes made. When I turn on the air it changes the idle, but that happens with my diesel suburban also and with other cars I have had. My headlights seem to change the idle much more than the air.
Thanks for your help guys!
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How bright oar the lights? Does this happen with the parking lights also?
If you have a small short some where, that increases heat on the wire and amperage pull, which then makes the alt harder to turn.
If no short, resistance also creates heat and increases the call for amps to push the same voltage, resulting in the same harder to spin alt.
Get the charging system checked, and check all connections, making sure they are not getting hot.