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Reverse lights stopped working

Tiny
RC ANDERSON
  • MEMBER
  • 1990 CHEVROLET 3500
  • 7.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 39,000 MILES
My reverse lights work when they want to, most of the time the chose not to. I have tried adjusting the neutral safety switch by rotating it to the right while it is in low gear and then shifting into park, which worked until the first time I shifted, then it stopped working again.

I just replaced the neutral safety switch with a brand new one that I bought today, and now the lights are not coming on at all.

I have brand new LED light bulbs in there that I put in last month, so I know that isn't the issue.
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Tuesday, June 23rd, 2020 AT 5:51 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I attached the wiring diagrams that we need to start running through the circuit to find where you have power in the reverse circuit and then trace it to find where you don't. I suspect this is a wiring issue and it sounds like it is shorted to ground so the power is not actually getting to the lamps.

Let's start at the beginning and work back to the lamps to find where the power stops.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
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Tuesday, June 23rd, 2020 AT 6:43 PM

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