Pump Motor Circuit Not Working Properly
- Remove ABS pump/motor relay (if installed) from Power Distribution Center (PDC). Remove jumper wire from ABS pump/motor relay socket (if installed). Turn ignition off, and go to next step.
- With DRB-II in ohmmeter mode, probe Tan/Black wire (Brown/White wire on Grand Cherokee and Grand Wagoneer or Tan wire on Wrangler) at ABS pump/motor relay socket. If resistance is less than 5 ohms, repair Tan/Black wire (Brown/White wire on Grand Cherokee and Grand Wagoneer or Tan wire on Wrangler) for a short to ground. Perform VERIFICATION TEST VER-1A. If resistance is more than 5 ohms, go to next step.
- Using an external ohmmeter, check ABS pump/motor relay diode. Attach ohmmeter positive and negative leads as shown. See Fig 1 . If continuity exists, replace ABS pump/motor relay. Perform VERIFICATION TEST VER-1A. If no continuity exists, replace ABS pump/motor assembly. Perform VERIFICATION TEST VER-1A.