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Unread 10-26-2014, 12:31 PM   #1
waterboarder
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2007 JK Wrangler 
 
Join Date: Sep 2007
Location: Belfast
Posts: 6,351
Stock Fog Light Switch issue?

So, many years ago, I modified the wiring to my factory fog lights, so that I could toggle them on via my own switch, in addition to the factory switch. Many years later, I removed my wiring, and did not hook things back up to the stock switch. Now I am trying to hook up the stock switch to the factory fogs and I am running into issues.

1). I have a blue wire, which I labeled (many years ago), "stock fog light switch". Using my multimeter, I get 12v on this wire, regardless of the position of the stock fog light switch (on or off), regardless of whether the keys are in, the accessories on, or anything else. It's 12v always on. This all boggles my mind - but put that on hold for a minute.

2). I also have the positive wire to the fog lights. When I connect it to the positive terminal of the battery, the fog lights come on. So I know the fogs are working, and all that is needed is for this wire to get a positive 12v.

3). Now, if I connect the blue wire from #1 to the wire in #2, the lights do not come on. Since I've already determined Wire #1 is 12v hot, and that the fogs come on when Wire #2 gets 12v from the positive terminal, I don't understand why this is happening.

4). If I connect the multimeter to ONLY Wire #1, I get 12v. If I connect the multimeter to Wire #1 WHILE it is connected to Wire #2, I get 0v. I don't understand this.

5). I need to make this work so the vehicle passes the local inspections. If was never an issue before because Alaska doesn't have these silly inspections. I've already talked with local people and they all say to pass, the fogs must work, and be wired to the high beam cut off properly - so I have to get this working again.

Any ideas? Its worth nothing that at one point, I did have the fogs working from both the stock switch and my extra switch. I'm not sure what has happened since. One possibility is that the blue wire (#1) is not actually the stock fog switch and that I mislabeled it way back when (but I kind of doubt it), but this does not explain why it is 12v always on, but not powering the fogs.

For those of you who have messed with the stock fog light wiring....can you confirm the at the positive wire from the stock switch to the lights, over by the battery area, is in fact a blue wire (2007 model year, if it matters)?

The other possibility is that I am using the multimeter incorrectly....but I don't think that is the case either. But if anyone has ideas here too, please chime in.

All contributions appreciated.

Thanks,
wb

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Unread 10-26-2014, 01:48 PM   #2
Netpackrat
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2001 TJ Wrangler 
 
Join Date: Aug 2008
Location: Anchorage
Posts: 467
Do they have a requirement for you to have fog lights, or is it just if they are there, they have to be working? If the latter, remove the fog lights and install blanking plates for purposes of the inspection, and tackle the problem afterward. Otherwise obtain the factory wiring diagram and make what you have match that. You had such a rat's nest of wiring, I wouldn't try to sort it out without one.
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Unread 10-26-2014, 03:22 PM   #3
waterboarder
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2007 JK Wrangler 
 
Join Date: Sep 2007
Location: Belfast
Posts: 6,351
If present, they have to be working. To get them out is not easy, due to the bumper.
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Unread 10-28-2014, 07:43 PM   #4
waterboarder
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2007 JK Wrangler 
 
Join Date: Sep 2007
Location: Belfast
Posts: 6,351
Anyone?
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