Factory Fog Light Switch
08-21-2014, 09:30 AM
#11
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Join Date: Jun 2009
Location: valleycenter CA
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I'm to old school just let me drive - not the g d computers !
08-23-2014, 06:31 AM
#12
08-25-2014, 09:06 AM
#13
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The factory settings shut off the fogs when hi-beams are turned on. Since its a CAN-bus it can be reprogrammed. My SuperChips FlashCal was able to override the settings so fogs stay on with hi-beams. For wiring the LED bar to the factory fog switch I strongly recommend you run a fused 12v+ with proper fuse and wire size for the light and not use the factory harness to deliver the load. Length of run and number of required amperage factor into determine wire gage and fuse size. By using a relay you can use the positive from the factory fog light connector/harness as the switch trigger (pos 86) for the relay while the load comes from pos 87 of the relay. Connect pos 30 to the fused 12v + from the battery and pos 85 to a factory ground on the fender or the negative post on the battery. I also used the ground on the factory fog light connector for the ground to the lights since the wire gage was the same. I was able to use a female pin wire connector on my after market wires to plug into the factory harness so I didn't need to cut it off or splice into it. Works perfect and no worry of the CAN-bus freaking out if the lights pull more amps than the factory ones did and I can easily revert to stock.
08-25-2014, 12:28 PM
#14
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08-25-2014, 09:43 PM
#15
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Join Date: Aug 2014
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I had a Dodge Magnum with the CAN-BUS system. There is a DOT regulation for the fogs to turn off with the high beams. To get the magnums fogs to stay on, I just took it to the dealer and out it in "export" mode for the lights. Luckily the dealership didn't know about the reg, heck they even did it for free for me.
09-04-2014, 08:01 PM
#17
JK Enthusiast
The factory settings shut off the fogs when hi-beams are turned on. Since its a CAN-bus it can be reprogrammed. My SuperChips FlashCal was able to override the settings so fogs stay on with hi-beams. For wiring the LED bar to the factory fog switch I strongly recommend you run a fused 12v+ with proper fuse and wire size for the light and not use the factory harness to deliver the load. Length of run and number of required amperage factor into determine wire gage and fuse size. By using a relay you can use the positive from the factory fog light connector/harness as the switch trigger (pos 86) for the relay while the load comes from pos 87 of the relay. Connect pos 30 to the fused 12v + from the battery and pos 85 to a factory ground on the fender or the negative post on the battery. I also used the ground on the factory fog light connector for the ground to the lights since the wire gage was the same. I was able to use a female pin wire connector on my after market wires to plug into the factory harness so I didn't need to cut it off or splice into it. Works perfect and no worry of the CAN-bus freaking out if the lights pull more amps than the factory ones did and I can easily revert to stock.