Elusive #9 fuse issue?

1999 CHEVROLET TAHOE
250,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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CLASSICTAHOE
My lovely vehicle listed above suddenly decided to start blowing #9 fuses (tail/dash lights). I was wondering if someone could tell me where each major wiring harness connector is so I can break the problem into smaller sections, making it easier to track down, probable short.

Sometimes the fuse blows as soon as replaced, other times I can drive a few miles before it pops. Seems to not like rough/bumpy roads.

Thinking I can disconnect one section at a time and see if fuse holds on a test drive. Doing that should point to where a short is hiding.

Any help would be greatly appreciated.
Apr 20, 2025 at 6:44 PM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,503 POSTS
  • ASE Certified Mechanic
Yep, this is a common problem when the trailer plug wiring gets messed up, I would get under the rear of the vehicle and inspect the wiring, even have the lights on and move the wiring around to see if the fuse blows. Also, check the rear lighting plates and check the bulbs, sometimes they will melt causing the problem. Here is a guide to help us get started on fixing the problem.

https://www.2carpros.com/articles/no-tail-lights-exterior-running-lights-tail-lights-out

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Apr 21, 2025 at 12:05 PM
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