My ABS brakes come on frequently when I'm braking on dry pavements. I've had the rear drums machined and the front rotors replaced. That didn't fix the problem so I took it back to my mechanic and he ran it through the diagnostics but nothing came up. He's suggesting I take it to the dealer (I swore I'd never go back) and have them run it through their diagnostics... I guess it shows up more than his does. Any insite into this problem?