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  1. #1

    Post Courtesy Light problemsw

    I have a 1998 Suburban, the courtesy lights do not go off when the
    doors are closed and engine started. I suspect the problem is the
    Courtsey Light Control Module. Question is where is it located.

    Also there seems to be a relay clicking when the courtesy lights
    sometimes go on and off rapidly. I can't find it either.

    If anyone has worked on similar problems let me know what you
    have learned. Please!

    Thanks in advance


  2. #2
    TrailLeadr's Avatar
    Join Date
    Jun 2005
    Coventry, Rhode Island


    I don't see any relays in the schematic for the courtesy lamps, and control module. Also I don't see anything in my book that explains where to find the module itself. I do see that it is tied in with the remote door lock module.

    The only thing I can tell you is the module has a five wire connection, which consists of: Grey, Orange, White, Pink, Black.

    Hopefully someone else has an easier answer, but if no one else does, you can do this.

    Pull the interior dimmer switch, and follow the grey line. If you have Remote keyless entry, it will bring you to the Remote door lock module, from there, you should find a black wire, that will bring you driectly to the the lamp control module.

    If you don't have remote keyless entry, the grey wire will bring you right to the lamp control module.

    I can get a copy of the scematics up on the site a little later, but it's too late to do it right now. Sorry.
    Rhode Island

  3. #3


    The information that I have says that is should be "under center of dash". Hope this helps.

    99 K 1500 Suburban
    78 Silverado Big 10 w/factory 454
    00 S-10 Blazer
    1976 Trans Am
    1980 Honda CB900 Custom

  4. #4


    I have the same issue on a 99 suburban, except that mine is intermittant. I can drive for a few miles and the lights will turn off. Other times I make my whole drive and the lights never go out. I've already replaced both front door switches, no change. Did the module resolve your issue and was it located center, under the dash?


  5. #5


    Back to top! Just happened to me this weekend,

  6. #6
    Jr. Engineer
    Join Date
    Feb 2007
    Edmonton, Alberta, Canada


    did you check the program options for your computer on your entry lights?

    also.. have you played with the drivers door switch or maybe the tailgate switch? check all those as well.

    1993 K1500 Suburban 350TBI, 378,486KMS on frame, 49,000KMS on Drivetrain. Lots of mods, built for haulin trailers and haulin @$$ :)

    2000 K2500 Yukon XL 6.0L Vortec 252000KMS custom CAI, and exhaust...but not done yet.

    "If you are dumb enough to do something you don't know how to do, and can't do it safely then WHEN you get hurt its your own fault...BONEHEAD"

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