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Old 11-26-2015, 06:46 PM
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8th_Notch's Avatar
Join Date: Jul 2015
Location: Southeast PA
Posts: 48
Rigid Dually's & OEM Fog Light Harness w/ Relay

Maybe some of you can help me out here:

I cut into one of my factory fog light connectors to trigger a relay so that my dually foglights wouldn't get the typical flashing/strobing etc from the goofy CANBUS. Another member on this forum did this mod and it works flawlessly, mine does not.

I am using a rigid industries wiring harness and everything is set up just fine--with the exception that my relays are buzzing like crazy. The first relay I used worked perfectly, and was silent when the jeep was sitting in the driving with the duallys on, then it started buzzing intermittently while driving around >10mph. I have a second relay (same make/model/manufacturer) that I tested and this one simply just buzzes and goes crazy the moment you turn it on while driving etc.

I'm wondering if it's just the crappy chinese relays or the CANBUS still messing with my lights. I'm going to try and get some Bosch relays and see if they work any better.

Any advice???? I'd like to NOT wire them directly to a rocker switch on the dash and use the factory fog switch.

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Old 11-26-2015, 10:49 PM   #2
Dusthol's Avatar
Join Date: Jan 2012
Location: Las Vegas NV
Posts: 3,869
It's the canbus system. U need a diode or resistor....not sure which. But there is a write up on here how he did it.
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