Well I've been fighting my abs/brake lights now for the last 16k miles. I've replaced the rear speed sensor and both front hub sensors. They just randomly turn themselves on and off. Recently they've been doing it after a full throttle run or if the road is bumpy which leads me to think a loose connection but I've checked everything and nothing is loose.

 

I burned my posi up which has been setting my lights off for a while. The metal shavings are messing with my speed sensor. If the rear fluid is clean and the sensors are new i dont know where to look but, the slightest metal in the rear will do it.

 

Fluid has 10k on it and it's synthetic and I definately ain't burnt it up. Son of a gun is dang tight and will hop around corners.

 

If you're breaking the rear wheels loose on the rough roads or on your full throttle runs, the speed differential between the rear and front wheel speed inputs can trip the ABS/brake light(s).

Rusty

 

Nah. This happens on smooth roads as well. Even from a 60mph roll when I punch it it'll trip em.

 

I had the same identical problem most of this year, fresh rear end oil oil and sensor didn't help.
It was in the wiring going onto the speed sensor.