Posted by MeAnthony on January 04, 2008 at 16:09:16 from (65.73.153.61):
My brother has a '91 Dodge Ram, 3/4 ton, 4x4, Cummins auto. He's having a problem with the headlights occasionally blinking of and on. It started with the high beams, but now does it on low beams also(both headlights, not just one side or the other).
The way he describes it, it has a steady rhythm, similar to the way the turn signal flashes. He's watched the amp gauge when it happens. The needle doesn't drop, like something would be shorting out. We cannot recreate the problem in the driveway.
I could be wrong, but here are my thoughts: I don't suspect a loose connection, due to the rhythm. I don't suspect the switch, only because I've never had one act like that before; I've only seen a work/not work scenario with a switch. I'm thinking a bad circuit breaker or headlight relay. If there are other possible causes, please let me know.
I've googled for wiring diagrams, but I can't find one. Can someone point me in the right direction? Or possibly tell me where the headlight relay is located?
Thanks in advance to all who respond with suggestions and/or solutions. Your assistance is appreciated.
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