Is headlamp connector a three wire connector? One should be voltage, hot all the time, use a digital multimeter to check for voltage. The others should be ground. Your dimmer and headlamp switch are on the ground circuit. One way to check ground would be to use a redundant ground jumper wire, If the lamp then works correctly, the problem is ground. Hopefully you can bypass switches to rule them in or out. If you bypass switch and lamp works correctly, then the switch is faulty. Just my opinion.
SOURCE: 1992 dodge dakota 3.9 4x4 no low beams and one high beam
Hi the first thing I check on for anyelectrical problem is a bad ground connection. Follow the headlight wires as far as you can, even when they disappear into a larger covered loom at random places, maybe even right next to each light, you will find a wire or several attached to ground, could be a inner fender, engine, etc.. sometimes a inner fender ground is just a selftapping screw, It may be rusted out or just loose. Headlights work through relays that are also located in the fuse boxes. I assume you have checked both fuse boxes, in the truck and under the hood, good luck, Chuck
SOURCE: 96 ram 2500 4x4 V-10
The indicator on the dash is connected directly to the high beams bulbs wiring so your problem is in the relay, it's burned out and it sticks in a partially closed position. This explains also why the high beams are dimmer than the low ones - the contacts on the relay are burned out and offer a much greater resistance to the flow of current, hence lower light.
Replace it.
SOURCE: when I turn on my
did you check bulbs see if your getting power to to low beam bulb harness trace wires
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