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Engine, Exhaust, Transmission and DifferentialPost questions here that have to do with the engine, cooling system, air intake, exhaust, Transmission and Differential
Wheel speed sensor or bad battery or badly corroded battery connections.
Does your battery look like this:
ANYTHING about the electrical system that causes unstable voltage or electrical noise can cause the wing to stand up and that light to blink.
I usually tell people to replace the battery and clean the battery posts FIRST. IF that does not help, then look at wheel speed sensors or the brake controller.