IGN 0 fuse in interior left panel keeps blowing?

Tiny
DAFUNKYBEAN
  • MEMBER
  • 2000 CHEVROLET SUBURBAN
  • 6.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 315,000 MILES
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?
Sunday, April 12th, 2015 AT 9:30 PM

7 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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.
Images (Click to make bigger)
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Monday, April 13th, 2015 AT 7:36 AM
Tiny
DAFUNKYBEAN
  • MEMBER
  • 3 POSTS
That helps a lot. I'll try to check it later today and let you know. Thanks!
Was this
answer
helpful?
Yes
No
+1
Monday, April 13th, 2015 AT 8:29 AM
Tiny
DAFUNKYBEAN
  • MEMBER
  • 3 POSTS
It turned out to be a wire for the tow package. Thanks for the advise, put me toward the right path.
Was this
answer
helpful?
Yes
No
Monday, April 13th, 2015 AT 4:44 PM
Tiny
JOHN ADAMS2
  • MEMBER
  • 1 POST
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?
Was this
answer
helpful?
Yes
No
Monday, March 8th, 2021 AT 4:06 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,125 POSTS
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
Was this
answer
helpful?
Yes
No
Wednesday, March 10th, 2021 AT 5:26 PM
Tiny
SONNY26
  • MEMBER
  • 2 POSTS
Can't find the IGN O fuse, 2000 Astro
Was this
answer
helpful?
Yes
No
Sunday, September 10th, 2023 AT 12:40 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,752 POSTS
Please post your new question here, you must be logged in.

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

Cheers, Ken
Was this
answer
helpful?
Yes
No
Monday, September 11th, 2023 AT 11:44 AM

Please login or register to post a reply.

Related Fuse Panel Fuse Accessory Fuse Content

VIEW MORE