Magnetic Clutch Does Not Operate

Normal Operation Of Magnetic Clutch
The ECM controls the operation of the condenser fan and magnetic clutch, depending on engine load. The magnetic clutch is supplied with battery positive voltage as follows:
1. The A/C and fan switches are turned on.
2. The ECM receives a signal that the A/C and fan switches are on and creates a ground circuit.
3. The A/C relay is magnetized and the contact is closed.
4. Battery positive voltage is applied to the magnetic clutch and the clutch locks.


Step 1








1. Check the fuses.
2. If the fuses are OK, go to Step 2.
3. If a fuse is burned, check for a short circuit in the harness before replacing it.


Step 2
1. Run the engine at idle.
2. Turn the A/C and fan switches on.








3. Measure the voltage at the A terminal wire of the magnetic clutch connector.


Step 3
1. Verify that the engine is running.
2. Verify that the fan and A/C switches are on.








3. Measure the voltage at terminals of the A/C relay connector.