Hi. I just replaced front hubs, rotors, calipers, and pads on my '86 F-150 4x4. After putting everything back together and bleeding the front brakes (master cylinder has separate resevoirs so I assume I don't need to do the back), the front brakes became stuck on after a couple of drives in it (both sides). What kinds of things could be causing this? Could a poor bleed job do this (I'm definitely a beginner)?

A couple other pieces of information that may or may not be related:

All of the brake fluid drained out of the front-side half of the master cylinder when I was replacing the calipers (probably should have plugged the lines when I disconnected them).

Even though the brake warning light is not on (I think it might not be working), it seems like the differential valve switch is on. I tried re-centering it by following the directions for doing this in the Haynes manual (using a voltmeter instead of the warning light), but couldn't seem to get the voltage to go away.

Any ideas/suggestions/things to try welcomed.

Thanks,
Tim