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Old 01-27-2012, 07:47 PM   #1 (permalink)
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tail lights/how to wire?

trying to figure this out, a little out of my league but i think i have an idea. I put LED lights on my Fj40/trail rig and need some ideas. I am running an LED 4" round light (what you see on an 18 wheeler) but can determine how to wire the stop and turn signal together in the light and have it not back feed. I know there is a diode or something that allows power to go one way and not the other. what do i need to do this right?
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Old 01-27-2012, 08:34 PM   #2 (permalink)
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Quote:
Originally Posted by Spacecwboy View Post
I know there is a diode or something that allows power to go one way and not the other. what do i need to do this right?
Radio shack stocks a pack of 10 One amp Diodes.

I would run the diode in the marker\tail\running light.
Easy to test what end you need. If the LED does not come on when you turn on the tail lights, turn it around.

one is all you need per light.

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Old 01-27-2012, 09:40 PM   #3 (permalink)
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You need a trailer wiring converter. It is a little box that you run your brake and both turn signals to (three wires) and it outputs two wires, one for each light with the turn and brake combined. They sometimes have the ground and running light wires going through them for a total of 5 in and 4 out.

Like this
http://www.amazon.com/Hopkins-46255-.../dp/B000CMKG6O



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Old 01-28-2012, 11:44 AM   #4 (permalink)
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Does your Toy have yellow turn signals in back? Then you'll need the adapter. If the turn signals are red and shared with the brake lights, you can hook the LEDs up directly to the vehicle wiring, usually, unless it's positive ground or some other strange setup. If you had a Jeep, you could wire them directly, I do know that, because that's how I did it.
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Old 02-01-2012, 11:51 AM   #5 (permalink)
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ok, i got the tail lights working with the help of the trailer light adapter, but now how about the front? the side markers are in place but i dont have anything on the front by the headlights to cover me as running lights/turn signals. Again I am stuck with the 2 individual lights that were there previously. I am looking for a small LED light in amber that will do double duty. everything i am seeing works only one way. is there something i can do/use to be able to use a single light to do both?

i thought i could just jump off the adapter i used in the rear but having brake lights and turn signals working together was going to be a little hard to pass for inspection. thoughts?
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Old 02-01-2012, 02:29 PM   #6 (permalink)
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Use a second adapter? It doesn't know what the "brake in" signal is, just run light power to the brake input and turns signal input as normal.
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Old 02-01-2012, 04:54 PM   #7 (permalink)
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thats what im leaning toward. at 30 bucks for the adapter i want to make sure it will work
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Old 02-01-2012, 04:57 PM   #8 (permalink)
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you shouldn't have to have the side markers blinking with the rear lights, unless you want to, other wise the side markers are just on with your running lights
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Old 02-01-2012, 06:41 PM   #9 (permalink)
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im doing it just because, but even if i didnt do that i would still have to have an adapter or run 4 amber lights across the front of the FJ40 and it just looks dumb. im going to pick up another adapter this weekend i suppose
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