93 Ford F250 XL, 5.8L, 4x4, 4spd overdrive What diagnostic procedure for brake/abs light that stays on all the time. PO had all the brake lines, front rotors, and brakes replaced. Tried unplugging the battery with no results. My EEC plug is under the hood. Haynes manual is no help. Cant find the rabs test plug or abs module. Haynes says on rabs test plug theres black wire with orange stripe.