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  #1  
Old 12-29-2010, 11:48 PM
02BlueRanger 02BlueRanger is offline
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Default Trailer Harness power problem

Hey guys, so i bought a tailgate brake light bar that hooks up to my trailer harness and it didnt work( it did on other my jeeps harness, same set up) and first i thought it was my trucks end of the harness so i cut it off and hooked up a new one(im sure i did it right) and it still didnt work. IDK where to go from here I dont want to take it to the stealership and have a whole new system put in if i can help it
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2002 Wedgwood Blue 4x4 |CAI, Dual Gibson Exhaust, Re-tuned | Exterior/Interior LED
Painted Interior | Painted exterior trim and black chrome
Black Leather Racing Seats | Black Carpet
Dual Headunit | Pioneer Speakers 180 W ea.
ATX 16x8 wheels on 30" BFG | 5% rear tint 20% front | Headlight Mod | 8K HIDS
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  #2  
Old 12-30-2010, 12:09 AM
Pbav8tor Pbav8tor is offline
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Default Re: Trailer Harness power problem

Check tow package relay under the hood.
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  #3  
Old 01-05-2011, 11:20 AM
etrailer etrailer is offline
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Default Re: Trailer Harness power problem

Is it an OEM trailer harness, or is it aftermarket?
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  #4  
Old 01-05-2011, 11:33 AM
02BlueRanger 02BlueRanger is offline
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Default Re: Trailer Harness power problem

its a OEM. and i just checked the fuses and all and they were all fine
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2002 Wedgwood Blue 4x4 |CAI, Dual Gibson Exhaust, Re-tuned | Exterior/Interior LED
Painted Interior | Painted exterior trim and black chrome
Black Leather Racing Seats | Black Carpet
Dual Headunit | Pioneer Speakers 180 W ea.
ATX 16x8 wheels on 30" BFG | 5% rear tint 20% front | Headlight Mod | 8K HIDS
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  #5  
Old 01-05-2011, 02:22 PM
Pbav8tor Pbav8tor is offline
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Default Re: Trailer Harness power problem

Did you check the relay?



It's the black one amongst the white ones. I replaced the OEM and everything works now.
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03 RANGER EDGE 3.0
60/40 Seat Mod, Expo Full Console, Expo Mod Diff Cover, Thunderbolt Signal Mirrors, Flowmaster, Billet Grills, One Piece Halo Projector Headlights, HID Fogs w/Halos,
LED Lightbar, Euro Taillights, Interior Accents Painted, OHC, Indigo Cluster, 7" LCD Headunit, Mustang Dome Light, Manik Brush Guard
PNW CREW
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  #6  
Old 01-05-2011, 02:40 PM
02BlueRanger 02BlueRanger is offline
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Default Re: Trailer Harness power problem

Yeah I checked it but it seemed fine? Idk how to tell effect its bad. Where would i pick another up?
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2002 Wedgwood Blue 4x4 |CAI, Dual Gibson Exhaust, Re-tuned | Exterior/Interior LED
Painted Interior | Painted exterior trim and black chrome
Black Leather Racing Seats | Black Carpet
Dual Headunit | Pioneer Speakers 180 W ea.
ATX 16x8 wheels on 30" BFG | 5% rear tint 20% front | Headlight Mod | 8K HIDS
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  #7  
Old 01-05-2011, 02:46 PM
Clinton Clinton is offline
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Default Re: Trailer Harness power problem

I think I might have some if they have 5 prongs
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  #8  
Old 01-05-2011, 03:25 PM
OscarMike OscarMike is offline
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Default Re: Trailer Harness power problem

Why did you just go and chop the harness off before checking other things? FAIL... You should have taken a tester to it before cutting it off...
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  #9  
Old 01-05-2011, 04:08 PM
02BlueRanger 02BlueRanger is offline
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Default Re: Trailer Harness power problem

Because I knew that the stock 1 have so much sand and junk in it but it wouldn't work anyway
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2002 Wedgwood Blue 4x4 |CAI, Dual Gibson Exhaust, Re-tuned | Exterior/Interior LED
Painted Interior | Painted exterior trim and black chrome
Black Leather Racing Seats | Black Carpet
Dual Headunit | Pioneer Speakers 180 W ea.
ATX 16x8 wheels on 30" BFG | 5% rear tint 20% front | Headlight Mod | 8K HIDS
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  #10  
Old 01-05-2011, 11:14 PM
4evermodding 4evermodding is offline
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Default Re: Trailer Harness power problem

Okay here is what happened, Mine did not work also, well so I thought, I took a test light to it and the trailer harness had power, so I scratch me head and pondered, AHHHHHHHHH; I decided to power the the (2) separate wires that the instructions spoke of, (1) red wire was to be connected to a 12 hot lead, This wire was spliced into the "BROWN" wire that leads into the tail light harness, ( Connecting it this way will allow the Tail light bar to only be turned on when headlight switch is turn to either position ) and not when you are not using your headlights, The other wire which is the (White) wire, This wire controls the reverse light that your Light bar may be equipped with, if so than this wire should be spliced into the black/pink wire that leads off the reverse light harness located in the tail light area.

note: In my case the light bar would not work unless it had power from the red ground wire, This wire has to be connected in order for the light bar to be powered.


P.s Due to the wide range of applications, many tail light bars will have different application for connections, however due to the simplicity most application will be of the same basic install.
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  #11  
Old 01-06-2011, 12:20 AM
02BlueRanger 02BlueRanger is offline
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Default Re: Trailer Harness power problem

hmmmmmmmmm interesting, thanks BRU, ill check that out.
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2002 Wedgwood Blue 4x4 |CAI, Dual Gibson Exhaust, Re-tuned | Exterior/Interior LED
Painted Interior | Painted exterior trim and black chrome
Black Leather Racing Seats | Black Carpet
Dual Headunit | Pioneer Speakers 180 W ea.
ATX 16x8 wheels on 30" BFG | 5% rear tint 20% front | Headlight Mod | 8K HIDS
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  #12  
Old 01-06-2011, 01:35 AM
jason73 jason73 is offline
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Default Re: Trailer Harness power problem

check your trailer ground wire make sure its grounded good and use a testor light to see if you have power when the lights are on. if not check your pluge clean it gress it so it stays good then see if that works
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  #13  
Old 01-06-2011, 07:45 AM
etrailer etrailer is offline
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Default Re: Trailer Harness power problem

If you have a circuit tester, check the trailer connector first. One step at a time, you can narrow down the problem.

Clip the ground of the circuit tester onto the ground pin on the trailer connector and test each pin for proper function. If it doesn't work, check fuses, relays and wiring. Look for pinches, frays or burns on the wires. If it does work, then we'll look at the light bar.

Double check to make sure you know how it needs to be wired. LED lights can be a bit tricky as often times they have small circuit boards inside that control the functions and they aren't as easy to wire or trouble shoot as incandescent light fixtures.

If you have a part number we can look up the instructions and comb over them.

I would be willing to bet that the problem is on your truck since it worked fine on your Jeep. Relays may go bad and not show any signs of trouble. Determine which is your trailer light relay and take it into an auto parts store with you. Try the new one.

----------

Oh, and when you do get it working, Dielectric Grease. Put it on the connectors. It prevents corrosion without insulating the electrical connection.
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