Radiator Fan Switch Circuit Troubleshooting (Short)
|1.||Remove the radiator fan relay from the under-hood fuse/relay box, and test it.|
Is the relay OK?
YES - Go to 2.
NO - Replace the radiator fan relay.n
|2.||Remove the radiator fan switch, and test it.|
Is the radiator fan switch OK?
YES - Go to 3.
NO - Replace the radiator fan switch.n
|3.||Disconnect ECM/PCM connector B (24P).|
|4.||Check for continuity between the No. 2 terminal of the radiator fan switch 2P connector and body ground.|
Is there continuity?
YES - Repair short in the wire between the radiator fan switch 2P connector terminal No. 2 and under-hood fuse/relay box.n
NO - Check that the terminals are firmly seated at the connectors. If OK, substitute a known-good Engine Control Module (ECM)/ Powertrain Control Module (PCM) and recheck.n