t600b electrical issue help!!!!

Discussion in 'Trucks [ Eighteen Wheelers ]' started by truckerbangin, Sep 17, 2014.

  1. truckerbangin

    truckerbangin Light Load Member

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    Jan 22, 2013
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    Good day all i have a 1996 kenworth t600b with ddec 3 11.1L driver had to jump starter to get starter rolling it melted the ground wire from the starter to the block. the truck started drove to the yard and was cut off and started fine a couple of times with no issues we disconnected batteries for the night for precaution. when batteries where hooked up the next morning ecm light was on but very faint with ign off. i changed key switch and it stopped ecm light from coming on with ign off. now with new key switch if i cut key on cel comes on as it should i can even read flash codes but that's the only thing that comes on when key switch is turned on the radio, windows, air conditioner or any acc in the cab will not work.
    at the batt wire on ignition switch i'm only getting 3vlts. i have checked all fuses none are blown all relays are working batteries are reading 12.7 volts i get full voltage at the starter but none in the cab or at fuse panel.

    i have pulled all battery cables and harness and every thing checks out ok. this one has got me totally puzzled. has anyone ever had an issue like this before?
     
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  3. Exiled

    Exiled Light Load Member

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    Apr 20, 2013
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    Did u check harness near the ECM ! In a mysterious problem similes to yours, even the ground cable get hot, had to refill batteries between jump starting, ....long story short, check ecm harness
     
  4. truckerbangin

    truckerbangin Light Load Member

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    Jan 22, 2013
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    got problem fixed a couple weeks back it turned out to be the chassis of the truck wasn't getting any ground solved the issue by grounding to the chassis by the battery box and everything has bin better then ever.
     
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