Trial
1. Disconnect the 5K power transistor connector.
2. Remove pin No. 5 with the light green/red wire from the connector, then connect a 1.2 - 3.4 W light bulb to sockets No. 3 and No. 5 of the connector as shown.
3. Reconnect the 5K power transistor connector.
4. Turn on the ignition (ON (II)). Make sure the fan motor is running.
Attention. To avoid losing a detachable contact, be careful not to damage the contact retaining tab when removing and installing it into the connector.
5. Isolate pin #5 from the chassis until testing is complete.