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Old 08-20-2012, 01:51 PM   #1
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Using an OEM switch for after market lighting

Hi Everybody, New member and first time Jeep owner here.
Rather than using the switch that came with the lighting kit. I am using a couple OEM switches and connectors to wire up some Hella lights. The OEM connector comes with four wires, can anyone tell me what goes where?
I thought it would be a cleaner look to replace the two switch blanks in the dash with OEM switches than mount the ones that come with the lights..

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Old 08-20-2012, 02:09 PM   #2
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What wattage are the lights you wiring in. If they are above stock you should wire them through a relay and use the OEM switch to energize the relay.

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Old 08-20-2012, 02:20 PM   #3
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What switch did you get to use. I would assume a normal switch would have 3 wires, power in, power out, and a ground. if you got a rear windshield switch, it would have power in, power out - wiper, power out - washer, and ground.
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Old 08-20-2012, 02:57 PM   #4
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I have two TJ OEM fog light switches and wiring harness connectors. It is a four prong switch. I am using 55 watt lights. Yes, I realize I need to use the relay provided with the kit. I need to know which of the wires in the connector goes to the relay, ground, power etc.
I just want to replace the switch that come with the lights with an OEM switch that will fit in the existing spaces. Thanks
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Old 08-20-2012, 03:11 PM   #5
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When wiring up my hella 500's on my bumper, I wanted to use an OEM switch also. But the switch wouldn't work with the wires that came with the lights. So, I went on eBay and bought an aftermarket switch that looks like OEM which pops right into one of the empty slots and wired up perfect. Hope this helps!
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Old 08-20-2012, 03:30 PM   #6
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They work for the factory lights...they gotta work for the after market as well. It is just a matter of knowing which wire goes where. Unfortunately, that is the rub.
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Old 08-20-2012, 03:39 PM   #7
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Here is the wiring diagram for OEM fog light switch...



I can't recall which model year that is from, but that should help some.
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Old 08-20-2012, 03:52 PM   #8
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Thanks erickpl
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Old 08-20-2012, 06:29 PM   #9
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You don’t state the yr the harness is for but for a ’97-’01: #1 orange from dash lights (dimmer controlled), #2 brown/white to relay coil, #3 dark green/yellow from fused power source, #4 black to ground. With this setup one of the 2 lights in the switch will work with the cluster lights & the other will light when the switch is “on” & of course the relay will close when “on” as well.



You can see this in the FSM. Go here for an online read only version:

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Old 08-20-2012, 06:52 PM   #10
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Thanks everybody.

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