Electrical problem

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by nuxoll17, Nov 13, 2012.

  1. nuxoll17

    nuxoll17 New Member

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    I have a 2003 2500hd and today I was called out to the parking lot because my truck was on fire.... It wasn't on fire but there was a distinct electrical burning smell. It was coming from a module on the passenger side wheel well. There is 3 of them, and one was burning from the inside. What are these to? If you need a picture I can get you one. Thanks for the help.
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  2. Conlan Rose

    Conlan Rose Super Moderator

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    Need a pic it sounds like a relay overheated or was overloaded. Do you have any after market lights or other electrical equipment?
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  3. nuxoll17

    nuxoll17 New Member

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    There is a trailer brake controller but that's it. Pic is coming
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  4. Conlan Rose

    Conlan Rose Super Moderator

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    What engine, tranny and drive do you have ie 4x4 or 2wd?
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  5. nuxoll17

    nuxoll17 New Member

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    [​IMG]

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    This is the solenoid that started to fry, it's a 6.0, 4x4. There are 2 others just like it

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    It's a stock tranny, 4L80E?
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  6. Conlan Rose

    Conlan Rose Super Moderator

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    Cab and box size? Sorry for all the questions I'm looking up the diagram.
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  7. nuxoll17

    nuxoll17 New Member

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    This is how it sits regularly

    [​IMG]

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    4 door, standard bed
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  8. Conlan Rose

    Conlan Rose Super Moderator

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    That definitely doesn't look very factory, but those are the aux relays for provisional lamps and accessories.It is also the location of where the second battery would be.

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    wiring-harness-accessory-power-supply-tc0271701.png wiring-harness-auxiliary-tc0269901.png wiring-harness-roof-marker-lamp-tc0265802.png
    What factory light do you have?
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  9. nuxoll17

    nuxoll17 New Member

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    Thanks a lot, that helps out, prolly all the electrical for the trailer brake
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  10. Conlan Rose

    Conlan Rose Super Moderator

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    It might be, do you have the roof marker lamps? Because I feel those are more likely to cause a problem or a short. If not I'd plug your trailer in and test you lights with some one watching under the ood as you test them. Also you can use a multimeter to test the voltage. It looks like you truck is wired for roof lamps, emergency lights, maybe wrecker and aux power supply.
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  11. nuxoll17

    nuxoll17 New Member

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    I have no other lights but headlights, tail lights and the cargo light...
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  12. Conlan Rose

    Conlan Rose Super Moderator

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    Hmm that's very odd then. Maybe the truck it prewired for it?
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