## Fan Controls

#### Radiator Fan Circuit Troubleshooting (cont'd)

10-15

1. Disconnect the radiator fan motor 2P connector.

1. Check for continuity between the No. 1 terminal of the radiator fan relay 4P socket and the No. 2 terminal of the radiator fan motor 2P connector.

RADIATOR FAN RELAY 4P SOCKET

RADIATOR FAN MOTOR 2P CONNECTOR

Is there continuity?

YES - Go to step 8.

NO - Repair open in the wire between the under-hood fuse/relay box and the radiator fan motor 2P connector terminal No. 2.

1. Check for continuity between the No. 1 terminal of the radiator fan motor 2P connector and body ground.

RADIATOR FAN MOTOR 2P CONNECTOR

Wire side of female terminals

Is there continuity?

YES - Replace the radiator fan motor.

NO - Check for an open in the wire between radiator fan motor 2P connector terminal No. 1 and body ground. If the wire is OK, check for a poor ground at G301.

1. Reinstall the radiator fan relay.

1. Disconnect the radiator fan switch 2P connector.

1. Connect the No. 1 and No. 2 terminals, of the radiator fan switch 2P connector with a jumper wire.

RADIATOR FAN SWITCH 2P CONNECTOR

Wire side of female terminals

Does the radiator fan run?

YES - Replace the radiator fan switch.

NO - Go to step 12.

1. Remove the jumper wire, and measure the voltage between the No. 2 terminal of the radiator fan switch connector and body ground.

RADIATOR FAN SWITCH 2P CONNECTOR

Is there battery voltage?

YES - Check for an open in the wire between radiator fan switch 2P connector terminal No. 1 and body ground. If the wire is OK, check for a poor ground at G301.

NO - Repair open in the wire between the radiator fan switch terminal No. 2 and the under-hood fuse/relay box.

a a a