Question about 1999 Chevrolet Silverado 1500

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I have a 2009 silverado 4x4 that when hooked to my horse trailer the running lights work but the brake lights do not?

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  • Ashley Jan 09, 2013

    The turn signals do not work either or inside lite when u flip the switch

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  • Chevrolet Master
  • 21,873 Answers

The parking lights and stop-turn signals are two different circuits so you would need to check the turn signal circuit coming out of the trailer plug on the truck first.
You should have one wire in the plug for each side, and they should be hot when the turn signal switch in in that position and the light is flashing on the truck.

Posted on Jan 09, 2013

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Posted on Jan 02, 2017

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GM Elec
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SOURCE: Hooked my 2007 Sprinter camping trailer to the

Is this a 4 way or 6 way connection system? If your truck is wrong, then all factory equipped trailer package harnesses would be wrong, tell your trailer guy...I don't think so.
Is this the first trailer you have hauled?
Let me know, and we will go from there.
REgards,

Posted on Mar 10, 2009

  • 1 Answer

SOURCE: brake lights do not work

Have you checked both bulbs , also check closely on all the fuses. if you have to, use a test light and probe all fuses on both sides of the fuses

Posted on Apr 24, 2009

iadame
  • 676 Answers

SOURCE: 2005 silverado trailer wiring

You may want to get a ground loop isolator or even cheaper. Go to radio shack and buy two 1amp diodes and put them on each turn signal wire. This will eliminate the problem. The diode will be black with a gray line. the line will go towards the trailer on each wire. this should take care of the problem.

Posted on May 08, 2009

  • 141 Answers

SOURCE: 09 Silverado LS no trailer clearance lights

make sure the ground wire is hooked up, i've seen many trailers where the ground wire just hangs, then your relying on the ground to work between the ball and the hitch, not typically a good ground.

Posted on Jun 05, 2009

outdoorsman5
  • 631 Answers

SOURCE: 98 chevrolet silverado k2500 4x4 left rear brake light not workin

I have the full wiring harness for the exterior lights if you need it. Send me a email with a link to this posting and I will send you the diagram. outdoorsman592003@gmail.com

Posted on Sep 18, 2009

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Hi there,

Here is a cheat sheet I compiled that you will find very helpful:


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
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Horse, stock or utility trailers:
White = Ground - 1
Blue = Electric Brakes - 2
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Black = Battery, aux power - 4
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Green = Right turn Brake - 6
Orange or Purple (not both) = Auxilliary or Reverse - 7

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


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Horse, stock or utility trailers:
White = Ground - GD
Yellow = Left turn/Brake -LT
Green = Right turn Brake -RT
Brown = Tail and clearance lights - TM
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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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REgards,

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