No power to the computer No power to the scanner

15

Asked by Mar 30, 2017 at 12:33 PM about the Chevrolet Silverado 3500

Question type: Maintenance & Repair

I hooked up a scanner to the truck and nothing happened. The scanner didn't
even light up. the batteries are fully charged. Where does the power to the
computer come from? what wiring harness carries the power to the computer?

6 Answers

95,225

What year truck is this?

15

2003 chevy silverado 6.6 duramax

15

What wire harness carries power to the ECM?/?? I feel it is a frayed wire cause sometimes it starts and runs fine.

95,225

Bottom right #16 comes from the battery is the power to fire up your scanner.

15

OK git it working. The code is P0380 Glow plug Heater circuit A. This truck 2003 chevy Duramax 6.6 turbo HAS a GLOW PLUG CONTROLLER MODULE and a GLOW PLUG RELAY. Which one heats up the glow plugs??????????????????/

95,225

The relay just switches on power. But here is a video on this... https://youtu.be/WMimUyz8yR0

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