My headlights do not come on, this started intermittantly. Switch has been replaced, fuse ok, bulbs changed. Is there something else in the circuit? A relay perhaps?
I had the same problem 1998 ford ranger. left headlight very dim. right head light worked normal. pull back for high beam flash left dim headlight would go out. put on high beems left light got even more dim. trouble shot wires and replaced blinker/high low beam/whiper unit didn't fix. replaced headlight didn't fix. looked at wireing harnes connecter that conects to headlight bulb and center (black Wire) female contacts was open more than the others. (was making weak contact (ground)
FIX:::: SLIGHTLY BENT BLADE ON HEADLIGHT TO MAKE BETTER CONTACT WITH WIRE CONECTION WITH WIDER FEMALE CONTACT RECPTICAL. HEADLIGHTS BRIGHT AS EVER AGAIN. PS ALSO PUT DIELECTRIC GREASE IN CONTACTOR.
HOPE THIS HELPS
Look under the hood.
There is a large relay which should have some info about lights on it.
I had this exact problem with my dodge ram
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