98 TJ - Factory Fog Light Troubleshooting

Apr 12, 2004 7 Replies

Does anyone know anything about how this foglight switch physically works?



I have encountered the following problem:


- fog lights wouldn't shut off (green light stays on whether switch is up or down)



- by smacking the switch with my hand it will turn off the fog lights (sometimes)



So, I checked for loose wiring. Nope.



Then I noticed the little light bulb that sits on top of the switch was loose (it must have come un-screwed). So I took it out. The switch works 100%. I put the light bulb back in and give it a twist and the fog lights never shut off. The light bulb is 100% working.



Has anyone ran into this before? How could a working light bulb somehow bypass the switch and leave the foglights on? Is it possible that the other light bulb (switch illumination) is causing this? Is the switch defective? Is the lightbulb defective?



Definitely weird, no?


Or you turned the bulb socket thingy too far...take the switch out of the bezel, go to wherever and get a new bulb, or replace both illumination bulbs in the switch, and let us know. The bulb (or maybe even the socket) is letting current bypass to the relays kicking on the fogs. Had same thing after putting my dash back together awhile back, changed the bulb and it worked fine...I had played with the switch and messed the bulb up.

Those bulbs are actually replaceable? I can't really see a part # on it.

Where did you find a replacement bulb?

Dealership wants $47CA for a new one.

I told them I don't need the green light that badly.

In news: snipped-for-privacy@posting.google.com, Joe Blow thought: | Those bulbs are actually replaceable? I can't really see a | part # on it. | | Where did you find a replacement bulb? | | "Joseph P" wrote in message | news:... || Or you turned the bulb socket thingy too far...take the || switch out of the bezel, go to wherever and get a new bulb, || or replace both illumination bulbs in the switch, and let us || know. The bulb (or maybe even the socket) is letting current || bypass to the relays kicking on the fogs. Had same thing || after putting my dash back together awhile back, changed the || bulb and it worked fine...I had played with the switch and || messed the bulb up. || || -- || -- || Joe Pribe || NC || jpribe 'at' nc.rr.com

So far I think I've solved the problem(s).

  1. Green illumination light bulb was loose (which was the sympton of the green light going on and off)
  2. Ground wire was loose (I used the Mopar fog light wiring set for the factory fog lights). The ground wire I had it tied to came off. (this would explain why me thumping the switch panel with my hand caused intermittent results (the ground wire jiggling)).

It's even possible 1/2 of the wiring harnesses came loose so I pinched them all together with my fingers again.

So far so good.

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