Diagnostic Aids

Suspected intermittents or opens at connectors can be detected with diagnostic service probe which permits voltage to be measured on wires without unplugging connectors. Ensure terminals make good connection. When diagnosing intermittent problems, select MALF HISTORY from scan tool ABS menu. Supplemental data can be used to duplicate problem. Pin No. 30 at underhood junction box should have battery voltage at all times. If problem is intermittent and only occurs in very cold conditions, cool relay and check for failure.