Radiator Fan Switch Circuit Troubleshooting

Radiator Fan Switch A Circuit Troubleshooting
1. Disconnect the radiator fan switch A connector.
2. Turn the ignition switch ON (II).





3. Measure the voltage between the No. 2 terminal on the radiator fan switch connector and body ground.
Is there battery voltage?
YES - Go to step 4.
NO - Repair open in the GRN wire between the radiator fan switch A and under-hood fuse/relay box.





4. Turn the ignition switch OFF, and check for continuity between the No. 1 terminal on the radiator fan switch A connector and body ground.
Is there continuity?
YES - Go to step 5.
NO - Check for an open in the BLK wire between the radiator fan switch A connector and body ground. If the wire is OK, check for poor ground at G101.
5. Check the cooling system.
Is the cooling system OK?
YES - Replace the radiator fan switch A.
NO - Repair the cooling system.