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post #1 of 9 Old 08-09-2017, 10:07 AM Thread Starter
supersport1409
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offroad lighting question

Hello everyone. Question on 2016 JKU Rubi, can I run 55watt halogen lights on stock fog light circuits? I'm replacing my bumper today with ARB's stubby front bumper which does not have fog light cut outs. I picked up their 55watt 6 inch driving lights to compensate. If I don't gave to run a separate circuit, well why bother. Thanks in advance!

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post #2 of 9 Old 08-09-2017, 10:18 AM
cranbiz
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The circuit is 24 Watts per light, 48 Watts total. Those lights are 55 Watts a piece.

This is more than the TIPM is designed to feed those with. Now what you can do is use a relay that the coil is triggered by the factory wiring and run seperate power feeds to the relay to actually power the lights.

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post #3 of 9 Old 08-09-2017, 12:01 PM
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Originally Posted by cranbiz View Post
The circuit is 24 Watts per light, 48 Watts total. Those lights are 55 Watts a piece.

This is more than the TIPM is designed to feed those with. Now what you can do is use a relay that the coil is triggered by the factory wiring and run seperate power feeds to the relay to actually power the lights.
that's what I thought as well - but when my TIPM went bad that was one of the things we strongly suspected caused the back feed - a lamp has a different load than a coil when viewed by the canbus (which monitors using the dedicated ground wire and hot wire). The coil can not be grounded using the same dedicated ground wire hence the back feed... a lamp and a coil (as I did) even more so.

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post #4 of 9 Old 08-09-2017, 12:09 PM
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Originally Posted by jwmbishop View Post
that's what I thought as well - but when my TIPM went bad that was one of the things we strongly suspected caused the back feed - a lamp has a different load than a coil when viewed by the canbus (which monitors using the dedicated ground wire and hot wire). The coil can not be grounded using the same dedicated ground wire hence the back feed... a lamp and a coil (as I did) even more so.
Interesting. I wouldn't have expected that. Might be able to protect the TIPM with a diode or 2 but that now gets complicated quickly.

So, OP. While it seems feasible to do this with a relay, in practice it may lead to a TIPM failure. The 55 Watt each lights will absolutely overload the TIPM so use my suggestion at your own risk and don't attempt to power those lamps with the factory fog circuit.

06 KJ
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post #5 of 9 Old 08-09-2017, 01:15 PM Thread Starter
supersport1409
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thanks for the response fellas, especially about the TIPM. looks like I'll be running these lights off a dedicated circuit and using up one of the switches on my a pillar switch pod..... bummer
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post #6 of 9 Old 08-09-2017, 07:42 PM Thread Starter
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another question...will I get a "code" or an indicator that my fog lights are out if I remove the bulbs and just tie the wires out of the way since I have no fog provisions on new bumper? I cant seem to source a aftermarket 24 watt light.
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post #7 of 9 Old 08-10-2017, 07:05 AM
cranbiz
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You will get a code but it won't set the MIL. If I remember right, it's a body module code for fog light circuit low or something like that.

I have several of these, headlight circuit high due to the LED headlights and lost comm to radio due to an aftermarket HU. None of these set the check engine light and will pass a state inspection here in NC.

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post #8 of 9 Old 08-18-2017, 07:48 PM Thread Starter
supersport1409
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Quote:
Originally Posted by cranbiz
You will get a code but it won't set the MIL. If I remember right, it's a body module code for fog light circuit low or something like that. I have several of these, headlight circuit high due to the LED headlights and lost comm to radio due to an aftermarket HU. None of these set the check engine light and will pass a state inspection here in NC.
what wattage are your headlights/how much more then stock? what is the highest wattage for ('16) fogs you would run? I got bumper installed today and really want to use the stock fog wiring for something
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post #9 of 9 Old 08-21-2017, 08:39 AM
cranbiz
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I'm running Trucklites with the anti flicker harness. Not sure what the wattage is. My fogs are stock, 24W lights. However, I'll be swapping those out shortly as I now have lost one of the lamps.

06 KJ
12 JK,2.5" Teraflex lift,Bilstein 5100's,BFG KO2's P305/65R17
17 WK2 Trailhawk
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