Code 8-15: Front Fail-Safe Relay Circuit
- Remove front fail-safe relay and test. See RELAY TEST under DIAGNOSIS & TESTING. If relay is okay, use a DVOM to check for continuity between relay connector Black wire and ground. If continuity does not exist, repair open circuit between fail-safe relay and ground. Also check for poor ground connection.
- If continuity exists, turn ignition on. Check voltage between Yellow /Black wire and ground. If battery voltage is not present, repair open circuit in Yellow /Black wire between fuse No. 17 and fail-safe relay. If battery voltage is present, turn ignition off. Disconnect 3-pin connectors from front solenoids. Check for continuity in MD6Brown/Black wire between fail-safe relay and solenoids.
- If continuity does not exist, repair open circuit in MD6Brown/Black wire between fail-safe relay and solenoids. If continuity exists, measure resistance between Red and Black wires of front solenoids. If resistance is NOT 1-3 ohms, replace faulty solenoid. If resistance is okay, measure resistance between Yellow and Black wires of front solenoids.
- If resistance is NOT 1-3 ohms, replace faulty solenoid. If resistance is okay, disconnect 5-pin and 21-pin connectors from control unit. Check continuity of Red /Black and Yellow /Black wires between right front solenoid and control unit connector. Check continuity of Red /Blue and Yellow /Blue wires between left front solenoid and control unit connector.
- If continuity does not exist in any circuit, repair open circuit between control unit connector and front solenoids. If continuity exists in all circuits, replace control unit.