CAMELPRO
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How did you wire your factory fog switch
I bought a wiring harness just like the ones that come with a lot of these light bars. It came with the relay and everything. I didn't like the switch, so I bought one from mictuning off Amazon. Searched and found some help with the wiring on here and it came out awesome! Here's a couple of links.
Amazon.com: MICTUNING Toyota LED Push Switch with Connector Wire Kit- Laser FOG LIGHTS Symbol -White: Automotive
The 6th photo down shows the wiring for the switch. The text lights up when you turn on the lights. It all lights up when you hit the switch.
Amazon.com: DT MOTO? Off Road ATV/Jeep LED Light Bar Wiring Harness - 40 Amp Relay ON/OFF Switch: Automotive
I just cut this switch off and used the other one. The only wire that needs to come through the firewall is the white one. You can tap into the fuse panel for switch power in the cab. I got switch ground off the cigarette lighter and illumination off the seat heater plug. I think it was one of the end wires on the harness.
The relay is prewired so you just need power and ground in the engine bay.