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  1. #31

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    Quote Originally Posted by aethompson1 View Post
    My owners manual says there is an auxillary cable on my 2009 3500HD with the factory installed trailer brake controller that I need to take to the dealer to have hooked up. I need this cable to charge the deep cycle battery on my dump trailer. Does anyone know where it is and what is the magical trick that only the dealer can do?
    i work at a trailer shop and ive seen it a couple diff ways. i havent done it on an 09 but on a 99-06 you have to pull the under hood fuse block apart and there are 2 eyelits haning around in there and 2 empy studs on the block. one brake controller and another 12v put 2 and 2 together add fuses if necessary and vwalw. hope this helps

  2. #32

    Default Trailer Plug Problem

    Quote Originally Posted by trainergeneral View Post
    excellent post but maybe you could help me out my 2009 silverado has no r/h brake or signal power at the trailer plug only , rest of lights and truck is ok .. thanks
    I have the same problem with my trailer plug on my 2004 Sierra 1500
    No R/H Signal, No Aux Power.Truck lights all work fine.
    Seems like a common problem.
    Anyone got any ideas ?

  3. #33
    Master Mechanic shadowt_t's Avatar
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    thanx for the diagrams
    ashes to ashes dust to dust:slap:




    chevy tahoe 08 LT with sunroof
    cd changer leather seat ,20"wheels
    chrome full set 5.3 V8 back sensores
    4x2 fog lamps and full tint

  4. #34
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    murdog94's Avatar
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    Quote Originally Posted by Crockett View Post
    I have the same problem with my trailer plug on my 2004 Sierra 1500
    No R/H Signal, No Aux Power.Truck lights all work fine.
    Seems like a common problem.
    Anyone got any ideas ?
    Check the fuses that power your trailer wiring.. I have had the same problem on a few of my trucks and since there are up to 4 fuses powering your trailer something to look at.
    Mike

    Currently

    1997 Chevy S-10 Blazer 4X4 with 330K miles and counting (Hunting rig).

    2009 Saturn Aura XE (wifes car)

    2011 F-150 Crew 4X4

    "Hold it to the floor till you see God.... Then Brake!!!!"

  5. #35

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    Quote Originally Posted by murdog94 View Post
    Check the fuses that power your trailer wiring.. I have had the same problem on a few of my trucks and since there are up to 4 fuses powering your trailer something to look at.

    Thanks For the reply Murdog94
    I have checked the fuses in the main Fuse Block before posting and everything looked ok.
    I was thinking maybe a loose connector somewhere along the harness but i havent managed to find it yet. It looks good at the rear of the trailer jack. I think i am going to have to find a wiring diagram to troubleshoot it further. Any suggestions are appreciated.

    Crockett
    2004
    GMC Sierra
    1500 4.8
    2wd

  6. #36
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    Ok not trying to beat this one up i know that in some trucks that there are two fuse blocks and that there are fuses in each block.. and if you have a loose harness id check right in back where the wiring actually connects together to allow for the trailer harnes first...

  7. #37

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    Wow, such a shame that people LINKED to photos for this thread instead of uploading or attaching photos to GMTC where they can stay forever. Great thread.

    Steve
    10 Chevy Traverse LT AWD
    02 Chevy Trailblazer LS (110K+ miles - loaded except for 4WD - WRECKED!)
    99 Chevy Cavalier LS (105K+ miles - commuter car)
    78 Chevy Suburban Silverado (454, 3/4 ton)
    62 GMC 3/4 ton Pickup (350 police interceptor)

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  8. #38

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    great diagram - does this diagram work with all brake controlers.
    I have a prodigy electronic brake controler and have just purchased a new 2012 gmc sierra denali and can't seem to find the wires under the dash or a wiring schematic. The tech from the dealer is on vacation and nobody has a clue where to look. I assume the wires are taped up under the dash and I will keep looking. Do the wire colors match up for the prodigy brake controler. TGhe colors for the prodigy are black= +12 volts, red= stop light, blue =trailer brakes, and white = ground. As soon as I find the wires under hte dash I hope the colors match up. Any guidance would be helpful Bdog

  9. #39

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    Send me a PM with your e-mail address and I can send you a pdf file that may help you. I tried to post it here but it is to large. I also have it as a powerpoint that shows the wire location under the dash and under the hood. It is for a 2007 NBS but I don't think much has changed for this.

  10. #40

    Default trailer brakes

    Thanks Jake,

    My email is bbissonn@gmail.com. Hope you can help.

    Bdog

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