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Thread: PCM or not wired right

  1. #71
    Join Date
    May 2008
    Location
    Kentucky
    Posts
    144
    ok don't want to confuse anybody with conflicting info.

    Truck will crank with key. Have power when truck is cranking through purple wire which goes to solenoid through starter relay,etc.

    Getting like 11.4 volts from crank signal and cam signal. Tested wires for breaks everything is coming out good showing good lines.

    Fuel pump is working and smell it very strong after cranking.

    No bad fuses and all grounds are grounded.

    Only thing I can think of is VATS are not turned off or PCM is bad. Not getting any codes back with scanner on diagnostic port although the red light to tell you there are codes is lit.

    Hopefully I'll hear from or get another PCM from nelson next week.
    1996 GMC extended cab, 2003 5.3/auto

  2. #72
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    I believe the SES light being on is the default mode when the key is in the "on" position. It's supposed to turn off once the engine starts.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  3. #73
    Join Date
    May 2008
    Location
    Kentucky
    Posts
    144
    that makes sense.
    1996 GMC extended cab, 2003 5.3/auto

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