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  1. T

    intermittent electrical issue no crank no start

    Update okay after three days of pull my hair out i stumbled on to what i guess is the problem. i was back probing the TCM checking grounds and powers they were good. but while i back probing pin #3 on connector c1(grey) orange power wire the needle had slid over and also made contact with pin...
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    intermittent electrical issue no crank no start

    i have tried grounding out the case on the TCM and that didn't change nothing. checked the power and the ground in the harness and even checked the resistance of the wires. checked the data bus for resistance .3 to .5 ohms on all wires checked. checked for power on the ignition 3 circuit and...
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    intermittent electrical issue no crank no start

    thanks Dave for the reply and the info. im going go through this and see if i can figure this out
  4. T

    intermittent electrical issue no crank no start

    here is a list of the current codes in the truck, ECM U0101 lost communication with transmission. TCM will not communicate BCM B1440 power mode master input circuits U1000 loss of serial communication for cluster U1000 loss of serial communication for HVAC B3770 airflow control 6...
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    intermittent electrical issue no crank no start

    i checked all the connectors and harnesses on the driver side. i removed the fender well cause i found a spot that was rubbing on the harness after further inspection it had only rubbed a hole in the wire loom and had not damaged any of the wires. would anyone have any wiring schematics to help...
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    intermittent electrical issue no crank no start

    the batteries are bout a year old had them both tested and checked out good. checked all the battery terminals and all are good and tight. i will check the connectors and harness when i get back to the truck in a little while thanks
  7. T

    intermittent electrical issue no crank no start

    hello everyone im new to this forum but not new to the diesel world. i am a diesel mechanic mostly heavy duty. i have 05 duramax 2500hd LLY, the drivetrain is completely stock, no programmer, no cold air intake and no exhaust. i put six inch lift and 35in tires on it a little over a year ago. i...
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