Fog Light Circuit - JeepForum.com
 
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post #1 of 8 Old 12-18-2014, 08:53 PM Thread Starter
Andythetechie
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Fog Light Circuit

I installed a new bumper with LED lights in it. I wired the LEDs into the wiring for the fog lights since they are not in the new bumper. A few nights ago I noticed that even with the jeep turned off the LEDs had a slight glow to them like they were getting minimal power. They would turn on as they should so it took a while to notice the low power draw that eventually killed my battery. Has anyone else come across this? How can I use the foglight wiring with LEDs without it drawing power when turned off?
Thanks!

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post #2 of 8 Old 12-19-2014, 05:09 AM
ultrabullit
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I haven't seen anything about them staying on with a dim glow, mine would flicker for about 30 seconds after turning the jeep off. Found out this was due to the CANBUS sending out test signal to the lights looking for blown bulbs, apparently it is just a small spike that has just enough power to fire an LED but not a filament bulb. The cure for my flicker was to wire a relay directly in-line with the lights. Power to the lights thru the relay and still use the factory circuitry to trigger the relay.

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post #3 of 8 Old 12-20-2014, 12:50 AM
JTB488
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Double check all your connections. 07's don't have Canbus so that shouldn't be causing your issue.
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post #4 of 8 Old 12-20-2014, 09:16 AM
ultrabullit
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Quote:
Originally Posted by JTB488 View Post
07's don't have Canbus .
Did not know this, thanks for the correction.

OP- I would do like JTB recommended and check all connections especially the ground. A bad ground can cause lots of gremlins.

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post #5 of 8 Old 12-21-2014, 09:00 AM
jwmbishop
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Something that is an always on circuit has a bad ground - and is back feeding your LEDs through the fog lamp circuit (electrons are good at finding the best ground path - leds light with very few electrons flowing). Pull fuses until the lights go off.... you've found the culprit circuit, trace it to find the bad ground.

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post #6 of 8 Old 12-21-2014, 09:22 AM
ronjenx
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Quote:
Originally Posted by JTB488 View Post
07's don't have Canbus so that shouldn't be causing your issue.
I haven't seen anything that indicates the '07s don't have CAN bus. I have seen a lot that indicates the '07s do have CAN bus.
I could be wrong, though, so can you post some documentation?

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post #7 of 8 Old 12-21-2014, 10:57 AM
JTB488
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Guess I could be working, didn't think they started using it then. I had an 06 that was free of it. Time to do some digging.
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post #8 of 8 Old 12-21-2014, 11:03 AM
JTB488
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Well can't find the exact year, but appears I'm wrong. It does have canbus. I'll shut my mouth now.
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