Fans High Speed Circuit Troubleshooting

Radiator and Condenser Fans High Speed Circuit Troubleshooting

NOTE: If the checks in this procedure are all OK, go to radiator and condenser fan circuit troubleshooting B.

1. Check the No. 3 (7.5 A) fuse in the driver's under-dash fuse/relay box.

Is the fuse OK?

YES - Go to step 2.

NO - Replace the fuse(s), and recheck.

2. Remove A/C diode A from the right side of the dashboard.




3. Check for current flow in both directions between the No. 1 and No. 2 terminals of A/C diode A.

Is there current flow in only one direction?

YES - Go to step 4.

NO - Replace A/C diode A.

4. Turn the ignition switch ON (II).




5. Measure the voltage between the No. 2 terminal of A/C diode A 2P socket and body ground.

Is there battery voltage?

YES - Repair open in the wire between A/C diode A and the A/C pressure switch.

NO - Repair open in the wire between A/C diode B and A/C diode A.