LED tail lights on a flat bed

BSANDERS22

MEMBER
1997 CHEVROLET SILVERADO
5.7L
V8
4WD
AUTOMATIC
120,000 MILES

At first it had a hyper flash with turn signals, and I fixed with LED compatible flasher, now when you apply the brakes the turn signal lights burn instead the red brake lights. Not sure if I need a jumper wire for tail lights for the red brake lights to light up instead of the turn signal lights?

Tuesday, June 15th, 2021 AT 7:28 AM

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

I suspect this issue is the same as the turn signals. You have a stop lamp relay that powers the stop lamps and it runs through the turn signal switch.

So I suspect it is the relay and not the switch but it may be both as LED lights have far less resistance then the halogen bulbs and it throws off the relays and control modules if it has them.

I would suggest checking the voltage from the relay on the highlighted wire from the relay

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

I attached the wiring diagram below to assist with this.

Please let me know what questions you have and we can go from there. Thanks

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