Driving Light Installation Question - Toyota FJ Cruiser Forum
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post #1 of 7 (permalink) Old 02-07-2010, 06:53 PM Thread Starter
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Driving Light Installation Question

Where is everyone running the wires for lights when they install them up on the roof?
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post #2 of 7 (permalink) Old 02-07-2010, 08:05 PM
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Re: Driving Light Installation Question

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Where is everyone running the wires for lights when they install them up on the roof?
Check this video out, should answer your questions...
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post #3 of 7 (permalink) Old 02-07-2010, 08:29 PM
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Re: Driving Light Installation Question

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Rlew0083 previously said: View Post
Where is everyone running the wires for lights when they install them up on the roof?

I'm using factory stuff. The switch, relay and fuse are installed. Just waiting for warmer weather so I can work outside when I pull the headliner down.

If you will be installing non factory lights up there I think you could just splice into the factory harness in the drivers windshield post. Yes you would be pulling the headliner down and drilling a hole.

Just my thoughts.

Last edited by rotorhed1; 02-07-2010 at 09:19 PM.
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post #4 of 7 (permalink) Old 02-07-2010, 08:56 PM
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Re: Driving Light Installation Question

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rotorhed1 previously said: View Post
I'm using factory stuff. The switch, relay and fuse are installed. Just waiting for warmer weather so I can work outside when I pull the headliner down.

If you will be installing non factory lights up ther I think you could just splice into the factory harness in the drivers windshield post. Yes you would be pulling the headliner down and drilling a hole.

Just my thoughts.
This is my method as well. The factory airdam and light bar does this as well. But if you are not using the Toyota stuff here is a nifty item I got from West Marine:


A hole is drilled in the roof and the item on the left dropped in place. It is sealed with a gasket to prevent water intrusion and a cap can be used to plug it when not in use. The recepticle sticks up less than 1/8'" above the roof line. The part on the right is attached to the lights and plugs in when the lightbar is mounted in place. The plug has an o-ring to keep water out of the electricals when in use.

I used this sytem because I planned on having my lightbar be quickly removable for times when I don't want them up top, like road trips and garage time.

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post #5 of 7 (permalink) Old 02-07-2010, 09:19 PM
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Re: Driving Light Installation Question

I also went thru the roof and used a special plug that radio shack carries it adjusts around the wires and seals well. I used clear RTV and a wire loom to be sure. I used
12ga wire that can handle alot of watts.

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post #6 of 7 (permalink) Old 02-07-2010, 09:40 PM
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Re: Driving Light Installation Question

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I used this sytem because I planned on having my lightbar be quickly removable for times when I don't want them up top, like road trips and garage time.
The only problem I see with this system is you are limited to two independent circuits. If you are doing a more extensive roof light syste, side lights, rear lights, two sets of front lights, etc., this 3 wire plug will not be sufficient.

What is the current rating of that receptacle ??

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post #7 of 7 (permalink) Old 02-07-2010, 09:54 PM
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Re: Driving Light Installation Question

It's true, you can only get two circuits on a three pin plug, but it works well for a simple forward facing offroad light system. The packaging does not give a current rating, but it was designed for use with large trolling motors and DOES say that you can use wire as large as 8 gauge, so that is substantial enough for a light bar in the front for sure.

One additional facet I should mention, it pushes in and twists to lock in place. Nice.

-Matt
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