Front Fail-Safe Relay Circuit
- Remove front fail-safe relay and test. See RELAY TEST in this article. Replace relay if defective. If relay is okay, use a DVOM to check continuity between Black wire and ground. If no continuity exists, repair open circuit. If continuity exists, turn ignition on.
- Check voltage between Black/Yellow wire and ground. If battery voltage is not present, repair open in Black/Yellow wire between fuse No. 17 and relay. If battery voltage is present, turn ignition off. Disconnect 3-pin connectors from front solenoids. Check for continuity in Brown/Black wire between fail-safe relay and solenoid.
- If no continuity exists, repair open circuit. If continuity does exist, 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 12-pin connector from control unit. Check for continuity between control unit connector and front solenoids. If no continuity exists in any circuit, repair open circuit. If continuity exists in all circuits, replace control unit.