"Anti-Lock" Indicator Test

If "ANTI-LOCK" indicator light comes on while driving and goes out again by itself after a short time, check voltage supply to ABS control unit at terminal No. 1. If "ANTI-LOCK" indicator light comes on while driving but ABS system is still operating (evident by pulsating brake pedal during hard stops), check voltage supply at "D+" terminal on alternator and at terminal No. 15 of ABS control unit.