Fog Light Mod
I know some of the guys on grand cherokee tech brought this up a few months ago so I was wondering if any of the xj guys have heard of this. I have read that there is a way to get your fog lights to stay on while your hi beams were on by bending a prong on the fog light #1 relay. I tried it on my 99 and my fog lights stopped working, so I was wondering if anyone had done this with any luck? Just to satisfy my curiosity. Thanks
Senior Member
Joined: Jul 2010
Posts: 501
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From: Connecticut
Year: 98
Model: Cherokee
Engine: 4.0l
I know some of the guys on grand cherokee tech brought this up a few months ago so I was wondering if any of the xj guys have heard of this. I have read that there is a way to get your fog lights to stay on while your hi beams were on by bending a prong on the fog light #1 relay. I tried it on my 99 and my fog lights stopped working, so I was wondering if anyone had done this with any luck? Just to satisfy my curiosity. Thanks
I was reading some threads on this recently too. Looks like you did the mod as it was described (or at least as I interpreted it). And you say it doesn't work? Are you sure it's the right relay. I think they mentioned something about there being 2 relays that control the fogs. I don't know if you'd hurt something by swapping the modded relay with the one in the second socket position.
Senior Member
Joined: Jul 2010
Posts: 501
Likes: 2
From: Connecticut
Year: 98
Model: Cherokee
Engine: 4.0l
I got it off jeepforum.com and from what i have read it works with all xj's 97+ but people are having trouble with 99's. 99's dont seem to have a relay in the second position, which says fog(drl). And I didnt hurt anything I just bent the pin back and now the fogs work. I guess Im just wondering if any guys that drive 99's have got this mod to work. But Im not gonna lose any sleep or anything over it. Haha.
Senior Member
Joined: Jul 2010
Posts: 501
Likes: 2
From: Connecticut
Year: 98
Model: Cherokee
Engine: 4.0l
Though it'd be easy enough to test the switch with a VOM. First with low beams and fogs on, and again with high beams and fogs on. See which terminal(s) looses voltage and backfeed that with a wire from the kickplate fuse box that's switched on with ignition. Also of the wires that go off, you'd need to figure out if it carried incoming or outgoing voltage. Technically it's only a control circuit, so it's not drawing a lot of amps.
***disclaimer***
I haven't actually done this. I am only theorizing.
***disclaimer***
I haven't actually done this. I am only theorizing.
Last edited by bobvalli; Dec 1, 2010 at 05:08 PM.
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