1999 Chevy Express ECM-1 20 Amp Fuse blows

1999 CHEVROLET EXPRESS
104,680 MILES • V8 • 2WD • AUTOMATIC
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RYAN1398
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I was advised to replace ecm module and I did . it worked for about a month. I also have a misfire code #1 cyl since the new ecm module was replaced and the ECM-1 fuse blows.the ecm 1 fuse was blowing before I replaced the old ecm module. the mechanic believed that the ecm was bad. it appeared that he was right but I now have the same problem
Jan 12, 2010 at 10:09 PM
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DAVE H
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Hello .. thanks for the donation .. much appreciated Unplug the ECM wiring connector from the ECM .. replace the fuse .. if the fuse still blows, you have a bad wire somewhere .. if the fuse does not blow, the ECM is bad and needs replacing again ! Hope this helps


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Jan 13, 2010 at 6:40 PM