TEST 2: Applying Power And Ground To The Blower Motor
If the blower motor passed TEST 1 with flying colors the next step is to actually see it run.
You can remove the blower from its location or you can test it with it still bolted to the A/C housing.
I usually perform this test with it still bolted to the A/C housing and I use jumper wires with insulated cocrodile tips to connect it to battery power and battery Ground.
If it's easier to remove it and bench-test it, then by all means remove it.
IMPORTANT: If the blower motor runs in your 2.4L Chrysler or Dodge vehicle, but it did not pass TEST 1, you can conclude that it is defective and needs to be replaced.
Let's get started:
- 1
Disconnect the blower motor from its electrical connector.
The connector has 2 wires. The dark green (DK GRN) wire supplies power and the black (BLK) wire supplies Ground (via the blower switch). - 2
Apply battery power to the blower motor using a jumper wire.
You'll be applying power to the male spade terminal (of the blower motor itself) that connects to the DK GRN wire of the electrical connector. - 3
Apply chassis Ground to the blower motor.
You'll be applying Ground to the male spade terminal (of the blower motor itself) that connects to the BLK wire of the electrical connector. - 4
The blower motor should run.
Let's take a look at your test results:
CASE 1: The blower motor ran and ran without any bearing noise. This is the correct test result.
You can conclude that the blower motor is not defective (and DOES NOT need to be replaced) if it passed the amperage draw test in TEST 1.
CASE 2: The blower motor ran with a lot of bearing noise. This test result tells you that the blower motor is defective and needs to be replaced.
Worn out bearings will cause the blower motor to use more current. This excess amperage draw will cause the blower resistor and/or the blower switch to burn out.
CASE 3: The blower motor did not run. This test result tells you that the blower motor is defective and needs to be replaced.
More 2.4L Chrysler And Dodge Tutorials
You can find a complete list of 2.4L Chrysler and Dodge tutorials in this index:
Here's a small sample of the tutorials you'll find in the index:
- How To Test Engine Compression (2.4L Chrysler, Dodge, Plymouth).
- How To Test For A Blown Head Gasket (2.4L Chrysler, Dodge, Plymouth).
- Ignition System Wiring Diagram (1995-1998 2.4L Cirrus, Stratus, Breeze).
- Fuel Injector Circuit Wiring Diagram (1995-2000 2.4L Cirrus, Stratus, Breeze).
If this info saved the day, buy me a beer!
