Question about 2004 Jeep Grand Cherokee

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I have a 2004 jeep grand cherokee i installed a 4 way flat plug for a utility trailer. I installed as instructions said but have no brake lights on the trailer, Everything else works. can you help me?

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You will need to add an trailer light adaptor for this vehicle. this adaptor will combine the brake and signals from two separate sources. this unit can be purchased at walmart, Canadian Tire, Partsource, autozone. trailer shops. it will fix your issue. or purchase the vehicl specific kit for your Jeep.

Posted on Sep 12, 2009

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1999 Grand Cherokee at night when headlights are on the right brake light goes off when you apply the brakes


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Mar 09, 2013 | 2004 Jeep Grand Cherokee

Tip

Trailer Wiring Cheat Sheet


Hello all,

For those of you that have or occasionally borrow trailers and look at the wiring plugs with disdain (I mean face it they don't make sense, grd is white, +12vdc is black, etc), this is for you.

Plug Types/Application
7 Way - RV Trailers, Horse and Utility Trailers
6 Way - Horse, Stock and Utility
4 Way - Utility Trailers

Columns are: Color, Function, Mark on the plug.

Seven wire Trailer plugs:

Horse, stock or utility trailers:

White = Ground - 1
Blue = Electric Brakes - 2
Brown = Tail and clearance lights - 3
Black = Battery, aux power - 4
Yellow = Left turn/Brake - 5
Green = Right turn Brake - 6
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Recreational Vehicle:
White = Ground - 1
Blue = Electric Brakes - 2
Green = Tail and clearance lights - 3
Black = Battery, aux power - 4
Red = Left turn/Brake - 5
Brown = Right turn Brake - 6
Yellow = Auxilliary or Reverse - 7


Six wire trailer 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

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depends if the person , installing trailer setup
used the factory kit
or just cut in to your wiring.

my 2010 WK has a fuse.
why not say what fails.? first.
brakes
blinkers L and R
parking lights.
and if the cars lights are effected?????? or hazards.

which location, will the fuses are all under-hood.
the operators guide names them all , lost that.

the factory kit comes with trailer relays to add to system.
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fess up and get free answers.

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zjlimited_1283.jpg
Here's a scan of the "instruction sheet" that came with my utility trailer's flat-4 wiring kit. (Retouched for clarity.)

zjlimited_1284.jpg


Hope this helps.

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Better yet, sell me your Jeep cheap, it probably can't be fixed, and it's worthless.

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