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Old 12-03-2011, 02:08 PM   #1
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headlights work some of the time

OK so I have a 99 tj. during the summer the headlights come on just fine. but when it is cold out they wont turn on until the engine warms up. I know the engine has nothing to do with the headlights but if I park in the garage they come on just fine so I think it has something to do with the temp.
I was thinking that the headlight relay is bad but I cant find one on the jeep and the part store says it doesn't have one.
does anyone know if they do have one and if so where is it?
I was also thinking if I don't figure this out soon I would just buy a relay and switch it off of the running lights and not have high beams for a while. Any advise would be appreciated.

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Old 12-03-2011, 02:40 PM   #2
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I suspect the headlight switch. Headlights do not run off relays unless someone rewired them.

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Old 12-03-2011, 02:44 PM   #3
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Take the switch out and clean the connectors.
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Old 12-04-2011, 12:03 PM   #4
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I have this same problem. I've noticed that flipping the switch from high - to - low beam rapidly & repeatedly seems to speed up the "warm up " process, until my lights start working properly. This leads me to believe that it's the combo switch in the steering column.
I haven't bothered to replace it yet though; my Jeep's a DD, so I wired a toggle switch / relay to the low beams as soon as the problem arose, until I can sort out the problem.
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Old 12-04-2011, 12:04 PM   #5
Knows a couple things...

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Replace your headlight switch, that is all that is wrong.
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Old 12-05-2011, 08:13 AM   #6
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^ agreed

mine was intermittent and needed a push pull on the headlight control to get them to come back on.

Switch is cheap to buy and easy to get to. take the lower dash panel (two screws by your knees) and if you want, taking the left speaker panel off gives you more visual room (open the door and the two screws on the side of the grill)

On the underside of the switch there is a small plunger with a spring on it, push it up and hold it in while pulling out on the headlight stalk (like you are turning the lights on, only keep pulling, it slides right out), this pulls it out of the switch body since the headlight knob can't fit through the mounting hole in the metal underdash support, then there is just a retaining nut on the back side of the stamped metal frame (underdash support) it goes through. Pull the one wire of the top and reverse the procedure for the new one.

I do believe I could qualify for a nascar speed test on removing a dash component, do it a few times and that dash is nothing to take apart!
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Old 01-27-2012, 05:13 PM   #7
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Quote:
Originally Posted by monkeee2002 View Post
I have this same problem. I've noticed that flipping the switch from high - to - low beam rapidly & repeatedly seems to speed up the "warm up " process, until my lights start working properly. This leads me to believe that it's the combo switch in the steering column.
I haven't bothered to replace it yet though; my Jeep's a DD, so I wired a toggle switch / relay to the low beams as soon as the problem arose, until I can sort out the problem.
Thats funny because that is almost what I did. I just hooked the relay up to the parking lights.
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Old 01-27-2012, 06:40 PM   #8
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Quote:
Originally Posted by dougncrew View Post
Thats funny because that is almost what I did. I just hooked the relay up to the parking lights.
Nice!

I actually like having mine on a toggle. Gives me a DRL option
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Old 07-07-2012, 09:50 PM   #9
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Quote:
Originally Posted by Kevbz
^ agreed

mine was intermittent and needed a push pull on the headlight control to get them to come back on.

Switch is cheap to buy and easy to get to. take the lower dash panel (two screws by your knees) and if you want, taking the left speaker panel off gives you more visual room (open the door and the two screws on the side of the grill)

On the underside of the switch there is a small plunger with a spring on it, push it up and hold it in while pulling out on the headlight stalk (like you are turning the lights on, only keep pulling, it slides right out), this pulls it out of the switch body since the headlight knob can't fit through the mounting hole in the metal underdash support, then there is just a retaining nut on the back side of the stamped metal frame (underdash support) it goes through. Pull the one wire of the top and reverse the procedure for the new one.

I do believe I could qualify for a nascar speed test on removing a dash component, do it a few times and that dash is nothing to take apart!
My parking lights and main headlights are tricky to be on... I have to pull the knob, then to push it a little... I will try your suggestion to get to the switch and try to clean first !

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