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OBD II Power failure

Discussion in 'GM Powertrain' started by k.daddy1, Aug 26, 2010.

  1. k.daddy1

    k.daddy1 Rockstar 100 Posts

    I have a 2000 chevy silverado that the SES light came on. I plugged my scanner up to it to retrieve the codes, but the scanner won't even power on. So just to check that my scanner didn't crap out, I checked it on another vehicle and it powered up fine. So I know the OBD II receptacle in my truck is not working. Now what?
  2. MrShorty

    MrShorty Epic Member Staff Member 5+ Years 1000 Posts

    A lot of times this is due to a fault in the power supply circuit to the diagnostic port. I know on my '98, the diagnostic port gets power through the cigarette lighter fuse, and, in a lot of cases like yours, that fuse is blown. That's where I'd recommend starting.
  3. k.daddy1

    k.daddy1 Rockstar 100 Posts

    Thanks! Cigarrete lighter don't work, but will check the fuse. Thanks Again
  4. Z71_guy

    Z71_guy Epic Member 5+ Years 1000 Posts

    i would say 90% of the time when a car comes into our shop with this issue its the cig lighter fuse

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