I think my headlight has a bad ground - JeepForum.com
 
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post #1 of 5 Old 04-07-2021, 03:26 PM Thread Starter
lacostadr
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I think my headlight has a bad ground

3.7L 2008 JGC.


Passenger headlight does not come on at all. Pass blinker works but when I put the headlights on the pass blinker does NOT work. I feel there is a bad ground somewhere.


Does anyone have an idea where/how the headlamps are grounded?

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post #2 of 5 Old 04-08-2021, 04:01 PM
2005JGC
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Yep! Sounds like a ground problem. For ease, check the ground 103 (pictured below). If that doesn't show any obvious sign of problem, I would probably want to check the headlight connector... the one that is also pictured coming in from the bottom and clipping to the bottom of that hoop. You may be able to remove the airbox and get your hands on it, but the front bumper and lamp assembly may need to come off.
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post #3 of 5 Old 04-11-2021, 01:20 PM Thread Starter
lacostadr
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Thanks for the reply.


Would you happen to have a "map" of all of the grounds in the engine compartment?
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post #4 of 5 Old 04-11-2021, 01:24 PM Thread Starter
lacostadr
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Also forgot to mention a few things..........


I replaced both headlights for cosmetic reasons which came with brand new bulbs. All have been tested and are working properly.


I replaced the turn signal/headlights switch on the steering column just to rule that out.


Wanna hear something crazy??? There are no fuses for the headlamps. There is supposed to be a 40amp fuse for the headlamps then one mini 20amp fuse for each headlight none of which is there at all in the engine compartment. In fact...there is no place to plug a fuse in like......there's a fuse "opening" but no fuse socket to plug into.


I got a strange feeling the last owners did some boogy bull**** electrical voodoo on this thing and it might be more than just a bad ground.
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post #5 of 5 Old 04-11-2021, 11:01 PM
2005JGC
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Yeah, headlamps are controlled by computer (front control module). It uses the computer for circuit protection because the computer can shut the circuit off if there was a short circuit.

Ill work to get you a location of all of the grounds in the engine bay.

The fact your turn signal and headlights have issues and the issues interact with each other (turning the lamps on causes the turn signal issue). The only place your problem could be is in the ground circuit they both share. The wire from the lamp assembly to the pictured ground above is really the only place your problem can be.

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