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post #1 of 14 Old 02-18-2009, 06:43 AM Thread Starter
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fog lights

hey i dont know if anybody has ever asked but im wondering if there is a way to make the fog lights stay on when the high beams/brights are on. if there is a way please let me know. i know it is prolly illeagle or something but when im in the middle of nowhere i cant see it really mattering. thanks a bunch.

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post #2 of 14 Old 02-18-2009, 06:47 AM
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I replaced my stockers with Deltas and ran a new relay and switch.


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post #3 of 14 Old 02-18-2009, 06:49 AM Thread Starter
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thats cool and it looks sweet nice jeep man, but in know theres gotta be a way to do it with factory fogs.
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post #4 of 14 Old 02-18-2009, 06:56 AM
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Quote:
Originally Posted by KRAZY AZ HELL View Post
hey i dont know if anybody has ever asked but im wondering if there is a way to make the fog lights stay on when the high beams/brights are on. if there is a way please let me know. i know it is prolly illeagle or something but when im in the middle of nowhere i cant see it really mattering. thanks a bunch.

seth
Short answer is no, the fogs are controlled by the Canbus and can't be changed. As the post above indicates they have to be re-wired to another switch. Another approach however included some creative use of relays... (and Diodes). The four diodes are important to prevent any back feeding of circuits. Relay #1 becomes self sustaining until ground from relay #2 is lost. You would need to turn on the fog lamps during low beam operation but will stay on when switched to high beam.
If there is any delay time between low to high beam switch, you may also want to install a capactitor before pin 85 of Relay #2 to insure the relay doesn't change state.


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Last edited by JohnnyD; 02-18-2009 at 06:59 AM.
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post #5 of 14 Old 02-18-2009, 07:09 AM Thread Starter
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wow nothin is easy on these jeeps its it. lol thanks for the diagrams.
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post #6 of 14 Old 02-18-2009, 07:59 AM
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I know on my TJ, if you bent/cut off one of the legs on the relay the fogs would stay on. Not sure if this is the same on the JK or not...maybe one of the electrical savy guys here would know....
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post #7 of 14 Old 02-18-2009, 12:08 PM
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The Dodge truck guys ran a jumper wire from one relay to another(not sure which ones) in the relay box under the hood, which made the fogs stay on with highs and lows. Here is a thread about it:
http://www.dodgetalk.com/forums/show...og+jumper+wire

Not sure if anything like this can be done to our jk's, I just remembered it from when I had my Ram.
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post #8 of 14 Old 02-18-2009, 02:55 PM
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Ive been trying to come up with some idea for this and i though of a jumper wire but im not so sure because the JK is an electrical nightmare compared to older models. I guess we can come up with and plan so whe dont mess up the canbus or anything else.

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post #9 of 14 Old 02-18-2009, 03:38 PM
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Quote:
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The Dodge truck guys ran a jumper wire from one relay to another(not sure which ones) in the relay box under the hood, which made the fogs stay on with highs and lows.
Did the same thing on my '05 Tacoma that I traded for the Jeep. You pretty much ended up with daytime running lights if you left the switch on. Sounds like that's not gonna work here though.
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post #10 of 14 Old 02-18-2009, 04:00 PM
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Originally Posted by Gunny View Post
I replaced my stockers with Deltas and ran a new relay and switch.


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post #11 of 14 Old 02-18-2009, 06:00 PM
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Quote:
Originally Posted by gijoejd View Post
I know on my TJ, if you bent/cut off one of the legs on the relay the fogs would stay on. Not sure if this is the same on the JK or not...maybe one of the electrical savy guys here would know....
Nope - this won't work on a JK

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post #12 of 14 Old 02-18-2009, 06:01 PM
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Quote:
Originally Posted by cbass View Post
The Dodge truck guys ran a jumper wire from one relay to another(not sure which ones) in the relay box under the hood, which made the fogs stay on with highs and lows. Here is a thread about it:
http://www.dodgetalk.com/forums/show...og+jumper+wire

Not sure if anything like this can be done to our jk's, I just remembered it from when I had my Ram.
Won't work on a JK

The wiring diagram I posted above is an OE diagram - there is no relay in the factory configuration. The fogs are controlled by the Body Control Module (BCM)

08 Silver 4 Door X - XD Bumpers - Slightly lifted, and some modest welding underneath... and a really loud stereo to block the wind noise
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post #13 of 14 Old 02-21-2009, 08:47 AM Thread Starter
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like i said before, nothing is easy on these jeeps is it? haha, jk breakin stuff is pretty easy. lol
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post #14 of 14 Old 02-22-2009, 06:25 PM
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if anyone goes through with johnnyd's plan, please document and post so i can follow your lead!

'08 X 2-Door, 4" Pro Comp suspension lift, 35" MTR Kevlars, Warrior tube doors, MBRP exhaust kit
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