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Old 03-16-2010, 06:52 PM
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Help Me Fix The Lights

I am having trouble with my headlights. I turn them on and they are on high beam. I can turn on the parking lights and get the fog lamps to work. The low beams don't come on when activating the dimmer switch. I have replaced the dimmer switch...same problem. I swapped the switch assembly from another jeep (that worked)...same problem. I simply can't get the low beams to come on. The high beam indicator stays on. When I toggle the dimmer switch the lights dim slightly but when I release the switch they stay on high.
What am I missing here? Any ideas?

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Old 03-16-2010, 07:45 PM   #2
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Sorry I can't help more...but perhaps this could be a problem with the relay that switches it between high and low beams?

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Old 03-16-2010, 07:49 PM   #3
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Has anyone done any wiring changes where possibly they forgot to reconnect a ground wire? Are the black ground wires that go to the headlight connectors connected to the body like they should be?
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Old 03-16-2010, 08:09 PM
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Relay? Where would I find that? The ground wires are connected to the back side of the radiator support close to the headlights. I'm leaning toward some sort of relay problem if I can find it. In my past experiences...grounding is the problem but I'm leaning away from it this time.
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Old 03-16-2010, 08:22 PM   #5
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I couldn't tell ya...only had my Jeep since October and haven't dug into it much. I assume it'll be on the passenger side of the engine bay near the battery.
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Old 03-16-2010, 08:28 PM   #6
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Relay? Where would I find that? The ground wires are connected to the back side of the radiator support close to the headlights. I'm leaning toward some sort of relay problem if I can find it. In my past experiences...grounding is the problem but I'm leaning away from it this time.
There is no relay in the headlight circuit.
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Old 03-16-2010, 10:16 PM
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OK...here we are back at square 1... I thought the relay on the back of the dimmer/headlight/turn signal might fix it...thats a flasher...Hmmm...
(whispering) It pisses me off jeep is @ Chrysler. Sure miss the old days!
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Old 03-16-2010, 11:28 PM   #8
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There is no relay in the headlight circuit.
What's the relay where you bend the pin down to stop the fogs from being killed when the high beams are engaged? I was figuring that also controlled the functions of the low beams kicking off when the high beams are engaged?

Sucks though...relay was my best guess...lol
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Old 03-17-2010, 06:25 PM
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Where would I look to find that relay? I'm sure it's something simple but I can't seem to figure it out.
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Old 03-17-2010, 06:30 PM   #10
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What's the relay where you bend the pin down to stop the fogs from being killed when the high beams are engaged? I was figuring that also controlled the functions of the low beams kicking off when the high beams are engaged?

Sucks though...relay was my best guess...lol
That relay is the foglight relay. The headlight circuit does not have a relay.
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Old 03-17-2010, 06:38 PM   #11
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Just a guess. The high beams are turned on and off by way of the turn signal switch. I replaced mine for another reason but I opened it up and it was hella corroded inside. I think that thing can reek havic in this area. It's about $80 bucks though. Good luck.
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Old 03-17-2010, 06:46 PM   #12
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Just a guess. The high beams are turned on and off by way of the turn signal switch.
Precisely, that switch contains the sum total of all of the high and low beam head light switching. At least on the newer TJs. Older TJs like mine had a separate dash-mounted on-off switch but the low/high beam switching has always taken place solely in the turn signal switch assembly regardless of the TJ's vintage.
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Old 03-17-2010, 11:30 PM
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Hmmm...I took the switch of my 2002 and tried it on my friends 2001 and still the same problem on his ...no low beam. I put my switch back on mine and it works fine. It has to have something to do with his wiring between the switch and the lights and it's not the ground...I checked that or the high beams would not work. Damn, got to get me another beer...
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Old 03-20-2010, 12:04 AM
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OK problem fixed...Thank you for your suggestions! As it turned out it was very simple and you all should know. If your lights act up and you can't figure it out send me money or cold beer and I will tell you. Not really...the high beam and the low beam power wires on the passenger side were making contact together at the plug attached to the bulb. Once seperated everything works fine. I need another beer!!!:banghead

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