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My reverse light are always on

My 05 chevy 1500 has a flatbed on it and was done on amature hour. The rear end wiring wasnt working so I decided to run new wiring from the fuse box using a fuse tap all the lights work but the problem is my reverse lights are always on. My question is does the switch for the reverse lights that i assum is either on the shifter or transmission lie between the battery and fuse box or the fusebox and the lights. If it's the latter then obviously I bypassed the switch but none of the other lights are like that so I don't see that being the case

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Hi @loganloren71558

The backup switch is between the output side of the fuse and the BCM (Body Control Module) i.e. battery → B/UP 20A fuse → backup switch → BCM → backup lights.

Here's the backup lamp wiring diagram from the service manual.

When reverse gear is selected (either AT or MT) B/UP 20A fuse supplies voltage via the operated backup switch, to the BCM. The BCM then supplies the voltage to operate the backup lamps.

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