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  1. H

    Need a little help with CANBus trouble.

    Thanks, but it's not lights going crazy, it's the ECU not allowing the vehicle to crank. It registers the key turning to Start, and will fire the starter only when commanded to by a scan tool..
  2. H

    Need a little help with CANBus trouble.

    Only codes are fuel pump system & EVAP related, see above for the fuel pump & the EVAP is a sticky vent valve.
  3. H

    Need a little help with CANBus trouble.

    Found it!!! The ABS module was cactus. The fuel pump control module connects to the ECU through it. What's the spread on the ABS module being out causing the vehicle not to crank? (Background: the start relay only fires when the ECU is commanded to by a diagnostic test, it will not fire the...
  4. H

    Need a little help with CANBus trouble.

    I would, but I just replaced them all with brand new 2 ga made in USA wire only 6 months ago. I crimped them. wrapped them in 2 layers of wire loom after putting adhesive heat shrink tubing on the ends. I did both battery hots (daul battery mod), the isolator to the alternator, the grounds to...
  5. H

    Need a little help with CANBus trouble.

    I got the computer to talk breifly through the ODB2 port after cycling the ignition off, this tells me that you're on to something @BattleTank
  6. H

    Need a little help with CANBus trouble.

    A dead module you say... The only thing I'd previously noted is that rolling down the road (especially when it's wet) sometimes I'll hit a buckle in the road & the gauges in the cluster will zero out & I'll get the "Service StabiliTrak" message on the InfoCenter & the StabiliTrak disabled light...
  7. H

    Need a little help with CANBus trouble.

    I've traced out a problem with my truck not starting as caused by a problem with CANBus on my truck; in particular CAN_Hi & CAN_Lo are both reading 11.49VDC from V_BATT on the ODB port with engine off. CAN_Hi to SIG_GRND measures as 5.679 kOhms, CAN_Lo to SIG_GRND is 5.634 kOhm, CAN_Hi to CAN_Lo...

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