A6 Check Battery Power to Anti-Lock Brake Control Module

- Measure voltage between breakout box pins 1 and 13.

- Is voltage reading over 10 volts?

YES -- Go to A7. A7 Check Battery Power to Anti-Lock Brake Control Module

NO -- Service circuit 601 (LB/BK) or power distribution box fuse 4 (60 A). Restore vehicle. Retest system.