Test J: Abs Indicator Always On: Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 GMC Savana Special, 2001 GMC Savana Camper Special, 2001 GMC Savana, 2001 Chevrolet RV Cutaway, and 2001 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

If ABS diagnostic system check has been performed, go to next step. If ABS diagnostic system check has not been performed, go to ANTI-LOCK BRAKE SYSTEM DIAGNOSTIC SYSTEM CHECK under SELF DIAGNOSTIC SYSTEM.
Turn ignition switch to OFF position for 5 seconds, then turn ignition switch to RUN position while observing ABS indicator. If ABS does not illuminate for 2 seconds, then turn off, go to next step. If ABS indicator illuminate for 2 seconds, then turn off, go to DIAGNOSTIC AIDS .
Turn ignition switch to OFF position. Disconnect Electronic Brake Control Module (EBCM) Natural 10-pin harness connector C1. Turn ignition switch to RUN position. If ABS indicator illuminates, go to next step. If ABS indicator does not illuminate, go to step 7 .
Turn ignition switch to OFF position. Remove Instrument Panel Cluster (IPC). Connect test light between IPC harness connector terminals A1 (Light Green wire) and B17 (Pink wire). See Figure . Turn ignition switch to RUN position. If test light illuminates, go to next step. If test light does not illuminate, go to step 6 .
Repair short to ground in Light Green wire between EBCM and IPC. After repair, go to step 8 .
Replace IPC. After repair, go to step 8 .
Replace EBCM. Perform tire size calibration procedure. See appropriate ELECTRONIC BRAKE CONTROL MODULE & BRAKE PRESS in ANTI-LOCK article in BRAKES. After repair, go to next step.
Turn ignition switch to OFF position for 5 seconds. Turn ignition switch to RUN position while observing ABS indicator. If ABS indicator illuminates for 2 seconds, then turns off, system is okay at this time. If ABS indicator does not illuminate or illuminates and remains on, go to step 3 .