I cleaned the battery posts and ground wires on my 2003 and now the Brake light along with abs light is on. Checked speed sensor(ok). any one have an idea on what to check?

 

When that came on, on mine, the wire to one of the front ABS sensors that went into the hub had rubbed the edge of the brake rotor and made a bad spot. I peeled the wires back, soldered and heat shrinked them, and all has been good since. I also made sure it wasn't going to rub again. Worth a look.