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  1. #1

    Default Fuse problem, maybe

    Went to get my service engine light read and I'm not getting any power to the quick connect for the computer under the dash. Guy said it runs on the same circuit as the cigarette lighter but I couldn't find any blown fuses. Does anyone have any suggestions maybe I was looking at the wrong set of fuses, If anyone could help please do. Thanks.

  2. #2


    Ummm, what kind of a vehicle are we talking about??

    2004 SILVERADO 2500HD LS
    Pro Comp Leveling Kit
    285-75-16 Cooper ST All Terrains
    Pro Comp Programmer
    Bilstein Shocks
    Linux Bed Liner
    Tinted Windows

    Other rides:

    1967 Landcruiser <350 Chevy>
    1970 Camaro
    1990 Geo Metro Convertible
    2007 FJ Cruiser

  3. #3


    My bad it's a 2002 Suburban LT

  4. #4


    Quote Originally Posted by SOUP View Post
    My bad it's a 2002 Suburban LT
    The first thing you want to do is verify with a volt meter that there is no voltage on pin 16 of your DLC <Data Link Connector> with the key on. If you do in fact have no power there then go to the cigar fuse in the power distribution box under the hood. Check this fuse. If it's good then you have to check the orange wire at pin 16 of the DLC back to the fuse. Check for aftermarket accessories like an alarm, stereo, amp, brake controller or anything under the dash. Techs like to tap into this orange wire. Does the cig lighter work? As a last resort you can jump 12 volts to pin 16 to get a scanner to work. Also, a bad or no ground at pin 4 of the dLC will cause a scanner not to work.

  5. #5


    the cig lighter does not work, Im going to check these things out and get back with you. Thanks for the help.

  6. #6


    Thanks for the help, it was the fuse, I was looking for a relay to be the problem.

  7. #7

    dwill3015's Avatar
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    You're my hero Jimmie. You give alot of great Q&A advice here and it is very appreciated!
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    2006 Silverado 2500HD LT3 4X4 CC SB Duramax LBZ
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