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1998 Chevy Tahoe ECM1 Fuse continues to blow

Tiny
JDHICKCOX
  • MEMBER
  • 1998 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 92,000 MILES
I have disconnected the CKP Sensor, both ignition leads, and fuel injectors. When I turn the key the fuse still blows (ECM1 20A). Any help? Is it connected to the fuel system somehow? I do not see it on a schematic that it is, but the fuel guage on the dash is not working. Pump powers up and rail fills with pressure.
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Friday, July 18th, 2008 AT 9:48 PM

1 Reply

Tiny
JDHICKCOX
  • MEMBER
  • 3 POSTS
IF anyone is experiencing the above problem, look at the wiring harness next to the alternator. Make sure the loom is in the plastic holder. If not secure it. It will fall down (and is real hard to see) and melt on the exhaust manifold. Engine will turn, it will act like no spark and blow the ECM1 fuse. It is an easy fix, but frustrating diagnosis.
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Saturday, July 19th, 2008 AT 9:15 PM

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