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How do i tell if my truck is prewired for fog lights?

Discussion in 'General Chevy & GM Tech Questions' started by Tdaz250, Jul 17, 2009.

  1. Tdaz250

    Tdaz250 Rockstar 100 Posts

  2. Z71_guy

    Z71_guy Epic Member 5+ Years 1000 Posts

    look under the truck, where the fog lights would be and look for any connectors not plugged in, make sure there is the same one on both sides
  3. 5speedsilverado

    5speedsilverado Epic Member 5+ Years 1000 Posts

    im pretty sure every truck is, they just dont have the switch, you also have to get the truck programed at the dealer for the fog lights.
  4. bill190

    bill190 Rockstar 100 Posts

    Usually these have the wiring to the lights, a fuse, a relay, and wiring to the switch.

    With newer vehicles, the switch may go to a computer module and the lights would be activated by another computer module. And as said above, these would have software settings for what is installed.

    To learn how the system works, be able the check for what is installed and what is not, the location of all these things, etc. you would need a GM factory service manual set which would include *complete* wiring diagrams.

    Usually you could figure out the connection to the lights in front and the location of the switch by looking in your owner's manual, but the "in-between stuff" can be impossible to find without a wiring diagram.
  5. 2ToNe04

    2ToNe04 Epic Member 5+ Years 1000 Posts

    looks under the truck if it has connections it came with it, mine didnt come with any :(

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