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No backup lights. The reverse backup light in the tailight…

Customer Question
No backup lights Mechanic's...

No backup lights

Mechanic's Assistant: Just to clarify, what are the exact lights you're talking about?

The reverse backup light in the tailight s

Mechanic's Assistant: What is the model/year of your GMC?

89 GMC K1500 5.7

Mechanic's Assistant: Are you fixing your vehicle yourself? What have you tried so far?

First no backup lights, but it was not plugged in. Plugged in and they worked briefly then stuck on. Now I have attempted to adjust the switch by rotating the part that rotates. I can get the light to come on, but they stay on. When I incrementally rtate back, the lights turn off, but i cannot find an adjustment whereby the lights are activated by the gearshift lever going into reverse

Submitted: 1 year ago.Category: GMC
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Answered in 51 minutes by:
8/7/2017
GMC Mechanic: JFN1, ASE Certified Technician replied 1 year ago
JFN1
JFN1, ASE Certified Technician
Category: GMC
Satisfied Customers: 5,694
Experience: GM Master Technician
Verified

Have you replaced the switch yet? At this point, I would just get a new one, install it, and see if that solves the problem.

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