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Old 09-05-2013, 03:57 PM
AndrewSY AndrewSY is offline
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Default Wiring Up the Third Brake Light on Truck Cap

Hey Guys, I am new here and I have a 1998 Ford Ranger single cab with a truck cap on it. It has a two bulb brake light in the rear window. Two wires are connected to it that run down the window on the driver side and they are connected to each other. I tried to see if I could get into the driver side brake lamp as it is separated from the turn signal, but I'd like to be able to disconnect a wire easily without having to struggle with it when I want the cap off. I have an electrical outlet for trailer lighting, but I am unsure if this would be the best option as it will be raining a ton here in Oregon. I do not see any wire that is underneath the truck that I could exactly tap into.

I've also read a bunch of forums, but I am still confused as I recently got my truck and I haven't seen anything obvious.
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Old 09-05-2013, 09:48 PM
Monkeee2002 Monkeee2002 is offline
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Default Re: Wiring Up the Third Brake Light on Truck Cap

My ranger had a cap on it from the factory. They spliced in a couple of wires at the left taillight, and ran them up thru the stake-hole, with bullet style connectors to unhook from the cap when needed.
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Old 09-06-2013, 12:52 AM
AndrewSY AndrewSY is offline
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Default Re: Wiring Up the Third Brake Light on Truck Cap

Are those bullet connectors easy to get a hold of somewhere like AutoZone or CarQuest? Sounds like me and my dad could do that.
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Old 09-07-2013, 06:24 AM
Monkeee2002 Monkeee2002 is offline
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Default Re: Wiring Up the Third Brake Light on Truck Cap

yes, they sell them pretty much anywhere: Autozone, Walmart, Home Depot. They just crimp on (You might want a crimper tool if you don't already have one)

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Old 09-07-2013, 07:04 AM
Mike In Bama Mike In Bama is offline
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Just be sure that the female connector above stays with the truck. The male will stay with the camper. Otherwise, when the camper is off and you hit the brakes, that exposed metal tip will be hot, ground out and blow a fuse.

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Old 09-07-2013, 07:13 AM
Bob C. of Indiana Bob C. of Indiana is offline
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Default Re: Wiring Up the Third Brake Light on Truck Cap

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Originally Posted by Mike In Bama View Post
Just be sure that the female connector above stays with the truck. The male will stay with the camper. Otherwise, when the camper is off and you hit the brakes, that exposed metal tip will be hot, ground out and blow a fuse.

2005 2.3L XL Electronics Tech since '70's
Great reminder Mike!
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Old 09-07-2013, 07:48 AM
rwenzing rwenzing is offline
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Default Re: Wiring Up the Third Brake Light on Truck Cap

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Originally Posted by AndrewSY View Post
I do not see any wire that is underneath the truck that I could exactly tap into.
Since the brake lamp function is separate from the turn signals in 1998, you're in luck. Look for a light green wire in a round, 8-position connector near the back end of the driver side frame rail. It is for brake lights only. Ground in the same connector is black. (The same color codes are also available at the subharness connections to each tail light.)

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I have an electrical outlet for trailer lighting
If you have the Ford factory trailer receptacle, it won't work correctly for a CHMSL because it is set up for combo brake/turn lights on the trailer.
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Old 09-07-2013, 01:33 PM
AndrewSY AndrewSY is offline
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Default Re: Wiring Up the Third Brake Light on Truck Cap

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Originally Posted by rwenzing View Post
Since the brake lamp function is separate from the turn signals in 1998, you're in luck. Look for a light green wire in a round, 8-position connector near the back end of the driver side frame rail. It is for brake lights only. Ground in the same connector is black. (The same color codes are also available at the subharness connections to each tail light.)

If you have the Ford factory trailer receptacle, it won't work correctly for a CHMSL because it is set up for combo brake/turn lights on the trailer.
Ah yes we (me and my dad) just realized it is the wrong combo for the third brake lamp. Alright so I guess we just need to figure out the right wires to connect the bullet connector to.
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1998, 3rd, brake light, truck cap, wiring

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