No Power to ECU

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09-12-2010, 04:34 PM

Brad Ackman

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No Power to ECU

I was driving and the truck just stopped and lost all power, now I have no ECU power my code scanner says error at the connection. Does anyone have any suggestions on what to do.....

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09-12-2010, 05:37 PM

projectSHO89

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Start by identifying your vehicle to include year, model, engine, and transmission.

Have you checked fuses that are listed in owner's manual? No owner's manual and 96 or newer? See below.

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09-15-2010, 07:35 PM

ELVATO

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My 03 Expy did that a bit ago. It was a faulty PCM board.

In your case, it may just be the PCM relay that died. Try switching it out.

Also, info on your truck would be helpful.

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09-15-2010, 10:01 PM

papajohn

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start by checkin all the basics which includes batt voltage, batt connections, and fuses. and CHECK FUSES WITH A TEST LIGHT. just because a fuse 'looks' good does not mean it is not bad.

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