TEST 2: Applying Power And Ground To The Radiator Fan Motor
In this test section, we're now gonna' apply battery power and Ground to the radiator fan motor on your 3.8L V6 Ford Mustang.
In case you're wondering, you don't have to remove the radiator fan motor to test it, since you'll have plenty of access to it once you remove the plastic engine coolant reservoir from its place.
You'll need to use some jumper wires to apply battery power and battery Ground to the fan motor.
These are the test steps:
Disconnect the radiator fan motor from its electrical connector.
The connector has 2 wires. The red (RED) wire supplies power and the black (BLK) wire supplies Ground.
Apply battery power to the radiator fan motor terminal identified with the number 1 in the illustration above.
You'll be applying power to the male spade terminal (of the radiator fan motor itself) that connects to the RED wire of the electrical connector.
Apply chassis Ground to the radiator fan motor terminal identified with the number 3 in the illustration above.
You'll be applying Ground to the male spade terminal (of the radiator fan motor itself) that connects to the BLK wire of the electrical connector.
The radiator fan motor should run.
Let's take a look at your test results:
CASE 1: The radiator fan motor ran. This is the correct test result. You can conclude that your Ford Mustang's blower motor is not defective.
CASE 2: The radiator fan motor DID NOT run. This test result tells you that the radiator fan motor is defective and needs to be replaced.
1997 Radiator Fan Motor Wiring Diagram
NOTE: The radiator fan motor wiring diagram above applies only to the 1997 3.8L Ford Mustang. You can find the 1998-1999 radiator fan motor wiring diagram here: 1998-1999 Radiator Fan Motor Wiring Diagram.