No power to the computer No power to the scanner
45

Asked by GuruYJG6 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
45

GuruYJG6 answered 7 years ago

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

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45

GuruYJG6 answered 7 years ago

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??????????????????/

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224,145

Rowefast answered 7 years ago

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

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