How To Test The Blower Motor (1998-2000 3.0L Ford Ranger)

TEST 2: Applying Power And Ground To The Blower Motor

In this test section, we are going to manually apply power and Ground to the blower motor using jumper wires.

The easiest and safest way to perform this test is with jumper wires that have alligator clips on the ends (see the photo above).

The objective here is to make sure that the blower motor runs and that it runs without a loud grinding noise (that would indicate defective bearings).

If the blower motor does not run, then you can conclude that it's defective and needs to be replaced.

These are the test steps:

1. 1

   Disconnect the blower motor from its electrical connector.
   
   The connector has 2 wires. The pink with white stripe wire (PNK/WHT) wire supplies power and the orange with black stripe (ORG/BLK) wire supplies Ground (via the blower resistor and blower switch).

2. 2

   Apply battery power to the blower motor's male spade terminal that connects to the PNK/WHT wire of the electrical connector.

3. 3

   Apply battery Ground to the blower motor's male spade terminal that connects to the ORG/BLK wire of the electrical connector.

4. 4

   The blower motor should run.

Let's examine your test result:

Let's examine your test results:

CASE 1: The blower motor ran and ran without any bearing noise. This is the correct test result and confirms that the blower motor on your 3.0L Ford Ranger Mazda B3000 is functioning correctly.

If your blower motor passed the test in TEST 1, then you can conclude that the blower motor is not defective.

CASE 2: The blower motor ran but ran with a loud grinding noise. This tells you that the blower motor is defective due to bad bearings or worn brushes and needs to be replaced.

More 3.0L Ford Ranger Tutorials

You can find a complete list of 3.0L Ford Ranger tutorials in this index:

• Ford 3.0L Index Of Articles.

Here's a small sample of the tutorials you'll find in the index:

• Tune Up And Torque Specifications 1991-1994 3.0L Ford Ranger.
• How To Test The TPS (1993-1994 3.0L Ford Ranger).
• How To Test The Fuel Injectors (1992-1994 3.0L Ford Ranger).
• How To Test The Fuel Pump (1992-2000 3.0L Ford Ranger) (at: troubleshootmyvehicle.com).