C1414-4: Check Circuit 91 (BK/BL) For Open

- Install Rotunda Breakout Box 007-00033 and ABS Breakout Box Adapter 007-00115 or equivalents to ABS harness connector.

- Measure resistance between ground and breakout box pin 14 and pin 25.

- Is resistance greater than 10K ohms?

YES -- Replace anti-lock brake control module. Restore vehicle. Retest system.

NO -- Service circuit 91 (BK/BL) short to ground. Clear DTCs. Restore vehicle. Retest system. If DTC C1414 retrieved on retest, Replace anti-lock brake control module.