Test F: Intermittent "Anti-Lock" Light While Driving
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1988 Cadillac Fleetwood, 1988 Cadillac DeVille, 1987 Cadillac Fleetwood, 1987 Cadillac DeVille, and 1986 Cadillac Fleetwood. However, it is still accessible from the selected car via links, so may be relevant.
Interruptions in the following circuits and others may cause the "ANTILOCK" lamp to light intermittently. This list does not include all possibilities. But includes those circuits most likely to cause an intermittent "ANTILOCK" lamp condition.
ECBM LOOP CIRCUIT, INCLUDING:
- Ckt. 866 (LT GRN.) from Pin 9. to Fluid level Sensor Pin A.
- Fluid Level Sensor Switch
- Ckt. 853 (LT BLU.) From Fluid Level Sensor Connector Pin C to Pressure Switch Connector Pin E
- Pressure Switch
- Ckt. 865 (PPL) From pressure Switch Pin to ECBM Pin 10.
IGNITION ENABLE CIRCUIT, INCLUDING:
- Ckt. 650 (PNK/WHT) from fuse to ECBM
MAIN RELAY CIRCUITS INCLUDING:
- Ckt. 855 (DK BLU) from ECBM to Pin 8 to Relay Coil (Relay connector Pin 2)
- Ckt. 803 (BLK/WHT) from relay coil to ECBM Pin 1 (Relay connector Pin T)
ALL WHEEL SPEED SENSOR CIRCUITS
Inspect connectors and wires in these circuits. If no trouble is found, see note on intermittents in this article and perform TEST A