IGN 0 fuse in interior left panel keeps blowing?

2000 CHEVROLET SUBURBAN
315,000 MILES • 6.0L • V8 • 4WD • AUTOMATIC
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DAFUNKYBEAN
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Fuse blows when ignition put into start to crank engine. It is fine when just in run or accessory position. Right side of fuse indicates power when tested w/light tester, but left side does not. I have replaced the ignition switch. IGN C fuse in under hood fuse panel good and lights up when tested. I am having trouble tracing where short might be located. I read the wiring diagram to be that the short would be located between IGN C fuse and IGN 0 fuse. With the ignition switch having been replaced, this leaves the direct line from the under hood panel to the ignition switch. Is this correct? There is a yellow wire from the under hood fuse panel that runs through the ignition switch and to the IGN 0 fuse that does not light when tested. How can I tell which wire this is and might it be the culprit?
Apr 12, 2015 at 9:30 PM
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HMAC300
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see the two pics one goes to powertrain module under hood and other to trans. it could be at junction block as well. try to get a circuit breaker to temp install while checking it as well as a compass to run along wiring, if wiring is screwed up it will drive compass crazy. it's a pink wire see pics.
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Apr 13, 2015 at 7:36 AM
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DAFUNKYBEAN
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That helps a lot. I'll try to check it later today and let you know. Thanks!
Apr 13, 2015 at 8:29 AM
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DAFUNKYBEAN
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It turned out to be a wire for the tow package. thanks for the advise, put me toward the right path.
Apr 13, 2015 at 4:44 PM
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JOHN ADAMS2
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My truck lost all dash gauges and lights last night and the transmission it stuck in I think third gear. when I put new fuse in the Ing 0 it pops right away. did your truck do this?
Mar 8, 2021 at 4:06 PM
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JACOBANDNICKOLAS
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Hi,

If the fuse is blowing as soon as it's installed, there is a dead short at some point. Check for shorts at the box and near it. If you do it in the dark, you may see a spark indicating the short.

Let me know what you find.

Joe
Mar 10, 2021 at 5:26 PM
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SONNY26
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can't find the IGN O fuse, 2000 Astro
Sep 10, 2023 at 12:40 PM
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STRAILER
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Please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken
Sep 11, 2023 at 11:44 AM