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Unread 12-10-2011, 11:07 AM   #1
MarkJRust
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Another Factory Fog Light Issue

Hey everyone, I'm brand new to the forums so go easy on me.

I have factory fog light set up on my XJ, when I purchased my XJ I bought new fog lights to replace the broken ones. They worked perfectly for around 6 months then one day they would not turn on. I'm assured that both light bulbs are not burnt out, because they both went out at the same time. Plus, the light on the switch in my interior still lights up... (Both are plugged in too :P)

Ways I've tried to fix it:

Replaced the fuse relay. --> Still does not work, switch still lights up.

I have another switch to swap in if everyone thinks that is the issue, because I've heard those go out pretty quickly but I'd rather not have to if there could be another easy trouble shoot first.

Let me know what you think!

Thanks, Mark.

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Unread 12-10-2011, 11:23 AM   #2
biffgnar
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What wattage where the new fog lights you put on? Perhaps you took out the wiring somewhere with too much. Do you have a multimeter? Start checking continuity before throwing parts at it.
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Unread 12-10-2011, 11:54 AM   #3
CJ7-Tim
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XJ's have notoriously feeble wiring for head lights and fog lights. Inspect your fog light switch for dirty/damaged contacts or overheating damage. Check the mini fuses under the hood, one is for the fog lamps. Test for 12 volts at the bulbs. Test the bulbs.

If you continue to have issues, you may want to use you factory switch to power a standard relay and upgraded wiring that you purchase and install.
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Unread 12-10-2011, 06:17 PM   #4
MarkJRust
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Thanks for the reply guys.

My knowledge isn't too great with electrical systems but...

They are replacements that match OEM fog lights, so it should be the same wattage.

"Perhaps you took out the wiring somewhere with too much. Do you have a multimeter?"

I have not touched the wiring, and I don't have a multimeter but I have access to a neighbor's.

I'm feeling there is an overheating issue on the switch, but would that cause the light (on the switch) to not turn on?

Then I'll check the power at the bulbs, with replacement bulbs in hand. (Should I place the multimeter to the wires running to the lights, or where the light plugs in?)

I'm really trying to avoid the trouble of rewiring anything, due to the fact that I'm not too good at it and have limited time + money due to school.

I will check the mini fuses under the hood, because I didn't when I changed the relay.

After doing all this, if i'm not getting power to the bulbs... is my only option to fix it is rewiring?

Thanks
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Unread 12-10-2011, 06:54 PM   #5
MarkJRust
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Good and bad news...

Checked the mini fuses in the power distribution center under the hood (with help of CJ7-Tim's diagram) and the fuse was blown. Replaced with a matching one, tried it out.. and nothing. It blew the 2nd fuse. Tried a 20amp fuse, blew that too. Not sure what is going on here electrically, but I assume this is where the problem lies.

What's the issue and is there a (easy) fix?!

Frustrated, Mark.
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Unread 12-10-2011, 07:04 PM   #6
CJ7-Tim
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If the fuses keep blowing, you have a short circuit. If the switch overheated and melted, that could be the source of the short circuit.
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Unread 12-10-2011, 07:24 PM   #7
MarkJRust
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Alright, I suppose I'll be buying more fuses tomorrow and pulling the faceplate on dash to get to that switch and swap with the new one.

I still am unsure about this though... if the switch was melted shouldn't the light not turn on?
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Unread 12-14-2011, 12:36 PM   #8
MarkJRust
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Bad news everyone..

Installed the new switch (even though the old one looked okay), and placed a new fuse in..

*POP*

Blew another fuse :/ Now we can rule out the relay and the switch. All there is left to troubleshoot is the wiring correct?

I really wish the new switch would have done the trick.
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Unread 12-14-2011, 09:07 PM   #9
Jason
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Sounds like a short to ground somewhere. Start checking wires.
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broken , electrical , fog , lights , xj

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