ABS and Brake lights stay on. Have plenty of brake fluid. Brakes work fine. 2002, 2WD 3500 dually, 49000 miles.

 

Check the wiring at theback end .. theres aconnection atop of the rear pumpkin, you may have some dirt or water in the connection or like mine.. a rock took it out.. got it tapped together been good last 3 months now.

 

try changing your vehicle speed sensor its towards the back of the transmission mine had that and no bus in the odometer i changed it and it runs fine the part is less than $20 autozone but beware of the transmission fluid hitting you in the face

 

Do you have some sort of a box on there? When I first put on my Smarty, the ABS and Parking Brake lights stayed on. After a few times of starting up the truck, it went away.

 

It's bone stock. also has 6spd manuel trans.