What can be wrong with my truck I have no brake lights or turn signals on drivers side an no turn signal on front of passenger side and drivers headlight will only work in high beam

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: Driver side signals only work when headlights are OFF

What may have happened is either the headlights wiring or the parking lights wiring somewhere along the wiring fused to the left turn signals wiring. Depending on if the turn signals go on when you put the parking lights on or the headlights on.

If the signals come on when you turn on the headlights than you only need to locate the light green wire that comes off the left turn signal harness.

Next follow that wire the entire way back to the firewall looking for another wire fused to that wire as you go.

If there are no signs of this you need to continue looking on the other side of the firewall all the way back to the turn signal and hazard flasher unit which is a black box that connects to a black harness located next to a grey harness behind the knee bolster.

But if the signals come on when you turn on the parking lights than you will also need to check the wiring from the rear left signal and follow that light green wire all the way back to the turn signal and hazard flasher unit.

This should fix your problem, but if not than your problem may lay within the the wiring between the turn signal/hazard switches and the turn signal and hazard flasher unit.

Also you may have a burnt circuit in the junction block. This block is where the light green from the rear left signal and front left signal meet. Don't have a description but if you cannot find it let me know and I will go out to the yard and look myself and let you know.

SOURCE: 2003 dodge ram deisel change fcm no change.still

sounds like fuseblock underhood is faulty..front control module is on fuseblock

lxguzenko

• 2 Answers
• Posted on Jan 22, 2013

SOURCE: dodge ram 3500 turn signal - headlight problem

on my 2006 dodge ram 3500 5,9l same problem with headlights and turn signal , the problem was with a fuse box , i replaced the fuse box everything work just fine.