Question about 2001 Ford F250 Super Duty Super Cab

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I have a 2001 f250. The trailer running lights quit working. I traced it to the t where the trailer plug loom splits and the brown wire with a white tracer has nothing there. Where do i go from there. I don't know where the next place forward to check is. Everything else in the loom is still working except for the running lights wire.

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  • 63 Answers

If It Factory Ford Tow Package And They Have Not Changed Things There Is A Fuse In The Fuse Panel For The Trailer Lights Hope This Helps

Posted on Jul 16, 2009

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1 Answer

I have a standard 4 flat trailer plug on my truck but my trailer plug is also a 4 flat plug but has two brown wires going to one prong. how do i hook them together to make all my lights on trailer work


The 4-wire flat plugs usually have a white (ground), green (right brake/turn) yellow (left brake/turn) and brown (taillights - left and right). If your brake and turn lights work but the taillights don't, check the plugs (trailer and truck sides) for corrosion, and chek both the trailer and truck wiring harnesses for chafed insulation and bare conductors on the brown wires. Likewiae if the taillights work and the brake/turn lights don't, perform the same checks on those wires. And last but not least, be sure that the white wires (truck and trailer) are grounded well to the truck body and trailer frame.

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95 ford f250 trailer wiring trouble what does each wire work and what color


The basic 4-flat trailer wiring colors are as follows.
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Jan 15, 2010 | 1995 Ford F250

1 Answer

2001 f 150 extended cab. trailer lights were working. had to replace a trailer light uhit because it was broken. now lights do not work properly. running lights work. turn signal only works if running...


The description of the problem is very confusing. If the trailer is disconnected, do all of the functions work OK? If so the problem is with the trailer wires. If all worked before you replaced the light, then thats where the problem lies. The turn signal/brake lights are a seperate circuit than the running lights. The brown should be hot with running lights, and the yellow and green are the turn/brake signals. The trailer lights should be grounded to the trailer frame, and the frame connected to the white wire, Make sure the white wire is connected to the plug on the truck side and connected to the frame of the truck. The turn signal that works with only the running lights on doesnt make sense, and grounds are the most common item. Some Ford trucks have seperate fuses for right and left. There a small fuse box under the hood, near the brake booster.

Nov 06, 2009 | 2001 Ford F150 Styleside SuperCrew

1 Answer

When i hook up a trailer the running lights wont work but the turn and brake lights work,sometimes the brake lights will stay on after i apply the brakes and i have to tap the brake pedal to make them go...


The things you need to check are the wires from the truck and the wireing to the trailer. If you have a 4 pin flat plug the wires are colored white,brown green and yellow.White is ground,brown is the tail light,green is right turn and stop,yellow is left turn and stop.The brake light switch on the brake peddle needs to be adjusted or replaced to cure your other problem.

Oct 22, 2009 | 1999 Ford F250 Regular Cab

2 Answers

Utility trailer wiring to 1998 Dodge Carivan


Trailer end; Red=Brake
Brown=Running lights
Yellow=Left
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You will need a turn and brake signal box IF, you have different bulbs for brake and turn lamps. If the brake and turn bulbs are one(red)lens than no box will be required. Thanks, Dana

Sep 28, 2009 | 1998 Dodge Grand Caravan

1 Answer

Running lights on the trailer no longer work, no power to the plug where the tailer loom cuts in.


check the trailer fuses under the hood in power dist. box on the driver fender they're not the same as the truck

Jul 13, 2009 | 2001 Ford F250 Super Duty Super Cab

1 Answer

I need a wiring diagram for a 2001 ford f150 trailer hitch plug in. i got a new heavy duty trailer connector and i need to know the color code of the wires


Hey Bryan

I've got them for Six and Four wire plugs

Six wire plugs:

Horse, stock or utility trailers:
White = Ground - GD
Yellow = Left turn/Brake -LT
Green = Right turn Brake -RT
Brown = Tail and clearance lights - TM
Red or Black (not both) = Battery, aux power - A
Blue = Electric Brakes - S

Recreational Vehicle: (color, use, plug mark)
White = Ground - GD
Yellow = Not used -
Brown = Right turn Brake - RT
Green = Tail and clearance lights -TM
Black = Battery, aux power - A
Red = Left turn/Brake - LT
Blue = Electric Brakes - S


Four wire plugs:
White = Ground
Yellow = Left turn/Brake
Green = Right turn Brake
Brown = Tail and clearance lights


Ground should be 10ga.
Others 14 ga

Best regards
Mike

May 02, 2009 | 2001 Ford F150 Styleside SuperCrew

1 Answer

I have a problem with the trailer light connector on my '05 F250 diesel. The test indicator shows right blinker and left blinker but no tail lights. No lights on the trailers (have connected boat and...


Check the plug at the back of the truck for corrosion. The brown wire entering the truck plug should be the the running lights, if no juice at truck plug in, you need to trace it back to the source looking for broken, pinched, wires, or poor connections.

Apr 10, 2009 | 2002 Ford F250 Super Duty SuperCab

1 Answer

Trailer light problem


Check it with a test light. White-ground, Yellow-left turn, Green-right turn, Brown-tailights. Check it on the truck first. There are seperate fuses for just the trailer wiring in the fuse box under the hood. The Blue and Red wires are for Trailer brakes, don't worry about those.

Mar 14, 2009 | 2005 Chevrolet Silverado 1500 2WD

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