Test K: Anti-Lock Brake Warning Indicator Inoperative

NOTE: Voltage measurement in step 1) is for prove out circuit. Voltage will only exist for a few seconds after key returns to RUN position.

Disconnect instrument cluster connector C225. Start engine. Measure voltage between ground and terminal No. 8 (Dark Green wire) at instrument cluster harness connector C225. See Figure and Figure . If battery voltage is not present, go to step 3. If battery voltage exists, go to next step.
Turn ignition switch to LOCK position. Disconnect instrument cluster connector C225. Disconnect Rear Anti-Lock Brakes System (RABS) module connector C217 (if equipped). RABS module is located behind center of instrument panel, to right of lighter. Measure resistance of Dark Green wire between terminal No. 7 at RABS module connector C217 and terminal No. 8 at instrument cluster connector C225. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open in Dark Green wire between RABS module and instrument cluster. Retest system.
Turn ignition switch to LOCK position. Disconnect instrument cluster connector C225. Disconnect 4 Wheel Anti-Lock Brakes System (4WABS) module connector C144 (if equipped). 4WABS module is located on left front frame rail. Measure resistance of Dark Green wire between terminal No. 1 at 4WABS module connector C144 and terminal No. 8 at instrument cluster connector C225. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open in Dark Green wire between 4WABS module and instrument cluster. Retest system.
Remove anti-lock brake warning light bulb. Check continuity between terminals of bulb. If continuity exists, replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Retest system. If continuity does not exist, replace bulb. Retest system.