my dad was driving his 99 f150 (220,000 kms on the clock) and he said it seemed like the brakes locked up on the rear passanger, now the snow is melting today, salt, sand, slush, i dunno if it just froze the brakes when he was in the store or what, so he drove it home we took both rear wheels off and everything seems to be fine, except rear driver seal leak (we were gonna check the diff fluid but coudlnt get the plug out), there was a little noise, i think from warped rotors, then the abs light came on when we were running it on the jack. we put it back together and took it for a spin, its not clunking, whinning, or locking up anymore....we are confused

oh yea and the abs light went off......