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BOTH LOW BEAMS QUIT WORKING BUT HIGH BEAMS STILL WORK.
ON A 1992 BUICK PARK AVE. 6 CYL. TRIED A NEW BULB IN BOTH BUT STILL DOSEN'T WORK, FUSES ARE ALL FINE, COULD THIS BE A RELAY PROBLEM OR A SHORT SOMEWHERE?
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More than likely there is a bad ground. The same ground wire that is used for the headlights is spliced into and used for the parking lights, brake lights and directional lights. The circuits for the brake lights, the brake light switch, the directions and directional switch are related. The circuits for the parking lights, headlights, headlight switch and high/low beam switch are related as well, but the only thing all these circuits have in common is their ground source. Any questions feel free to write back. Good Luck.
check low beam fuse when switched on if it has voltage registering across the fuse ,if there is voltage across the low beam RHS fuse then it is possibly a pinched wire from the headlight running back towards inside of the car
The high and low beam lights use the same power source, so if the low beams work the high beams have power. There is a low and high beam relay controlled by the dimmer switch. If the low beams work and the high beams don't, and the bulbs are good, check the dimmer switch and the high beam relay.
The headlight relay has probably failed. This relay is in the underhood fuse box. There are typically two of the same relays in there, so you can swap the low-beam relay for the high-beam relay to verify the problem before you shell out $30 for new relay.
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