Chevy/GMC OBS Truck Fast Blinking Tail Light Diagnosis & Repair

[@RomeroStBoxtalk]

Mine does that too I’ve replaced circuit board, lense, and harness wire. Someone said it is the switch on the steering column

[@rickygreenman2016]

Ground to frame😊

[@oscarflores2147]

Helpful video ! So I bought a new pair of taillights , but my rear blinker is still not working (passenger side). The front works perfectly fine. When I brake it also doesn’t light up. The drive side does but not passenger. Any suggestions?

[@DirtRoadie]

@oscarflores2147 I came here with identical symptoms (driver side, no turn signal or brake light) which were NOT resolved by replacing the circuit board.

[@ConstanceKing-l6q]

My left blinker blinks fast when I hit the brake after changing the bulb

[@rickygreenman2016]

Ground wire to m

[@rickygreenman2016]

Ground wire