Test R: Anti-Lock Brake System Indicator Inoperative: Testing

If anti-lock brake diagnostic system check has been performed, go to next step. If anti-lock brake diagnostic system check has not been performed, go to ANTI-LOCK BRAKE DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM in BODY CONTROL MODULES - AZTEK article.
Connect scan tool to Data Link Connector (DLC). DLC is located under left side of instrument panel. Turn ignition switch to RUN position. Using scan tool, select INSTRUMENT PANEL CLUSTER SPECIAL FUNCTIONS mode. Go to DISPLAYS TEST in OUTPUT CONTROL. Command all indicators on. If Anti-Lock Brake System (ABS) indicator turns on and off as commanded, go to next step. If ABS indicator does not turn on and off as commanded, go to step 4.
Replace Electronic Brake Control Module (EBCM). See appropriate ANTI-LOCK article in BRAKES. After repairs are made, perform anti-lock brake diagnostic system check. After performing diagnostic system check, go to next step.
Disconnect Instrument Panel Cluster (IPC) and connect a test light across appropriate power and ground terminals. See WIRING DIAGRAMS . If test light does not illuminate, repair open in power or ground circuit to IPC. If test light illuminates, check for poor, loose or corroded terminals in IPC harness connector. If no problem exists, replace IPC. See INSTRUMENT PANEL CLUSTER under REMOVAL & INSTALLATION. If problem exists, repair as necessary. After repairs are made, perform anti-lock brake diagnostic system check.