TEST 2: Applying Power And Ground To The Blower Motor
In this test section, we are going to apply battery voltage and battery Ground directly to the blower motor on your Ford Ranger (Mazda B2500).
With battery power and Ground applied to it, the blower motor should run. And as it runs, it should run without any kind of bearing noise.
There's a good chance, that you're gonna' need to remove the blower motor from its place on your Ford Ranger's firewall to be able to apply battery power and Ground to it.
Let's get testing:
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).
Apply battery power to the blower motor's male spade terminal that connects to the PNK/WHT wire of the electrical connector.
Apply battery Ground to the blower motor's male spade terminal that connects to the ORG/BLK wire of the electrical connector.
The blower motor should run.
Let's examine your test result:
CASE 1: The blower motor ran and ran WITHOUT any bearing noise. This is the correct test result and lets you know that your 2.5L Ford Ranger's blower motor is not defective (especially if it's amperage draw is under 40 Amps).
CASE 2: The blower motor ran but ran WITH a lot of bearing noise. This test result lets you know that, although the blower motor runs, it's defective due to bad bearings, worn brushes (which are causing the bearing noise).
CASE 3: The blower motor did not run. This test result let you know that your 2.5L Ford Ranger's blower motor is defective and needs to be replaced.
Where To Buy The Blower Motor
The blower motor on the 1998, 1999, 2000, and 2001 2.5L Ford Ranger and Mazda B2500 isn't an expensive part. The following links will help you comparison shop and save a few bucks:
More 2.5L Ford Tutorials
You can find a complete list of tutorials here: Ford 2.5L Index Of Articles.
Here's a sample of the tutorials you'll find there:
- Ignition System Circuit Diagram (1998-2001 2.5L Ford Ranger).
- Oxygen Sensor Circuit Diagram (1998-2001 2.5L Ford Ranger).
- How To Test The Front O2 Sensor Heater (1998-2001 2.5L Ford Ranger).
- Rear O2 Sensor Heater Test (1998-2001 2.5L Ford Ranger).
If this info really saved the day, buy me a beer!