Testing the 2000 Dodge Dakota 5 terminal blower motor resistor block involves two tests.
One is visually inspecting the resistor block for burn damage and corrosion and the other is a simple multimeter continuity test.
NOTE: This tutorial covers the ‘old style’ blower motor resistor assembly which uses metal coil resistors.
Contents of this tutorial at a glance:
- Blower Motor Resistor Basics.
- TEST 1: Resistance Testing The Blower Motor Resistor.
- Where To Buy The Blower Motor Resistor.
- More 4.7L Dodge Tutorials.
You can find the blower motor test here: How To Test The Blower Motor (2000 Dodge Dakota).
Blower Motor Resistor Basics
The 2000 Dodge Dakota comes equipped with one of two types of blower motor resistor blocks. It'll either have the integrated circuit-type resistor block or the resistor block with actual metallic coils.
These two are not interchangeable and are located in different locations. Also, they are tested differently. This tutorial only covers the metallic coil type blower motor resistor.
The blower motor resistor block (covered by this tutorial) is located in the engine compartment's firewall of your 2000 Dodge Dakota.
When the blower motor resistor block fails, you'll usually see one of the following symptoms:
- Blower motor works in high-speed only.
- Blower motor works in some speeds, but NOT all speeds.
It's very common for the resistor connector terminals to corrode or for the connector to burn and melt. This will make disconnecting the connector from the blower motor resistor block very difficult.
Another common problem is finding the resistor block coils corroded or burned out when removing the resistor block for testing.
TEST 1: Resistance Testing The Blower Motor Resistor
We're gonna' test the continuity of the blower motor resistor with a multimeter in Ohms mode.
Since we need to remove the resistor block to test it, it'll give you the opportunity to inspect it for broken or burned resistors (coils) and its connector for any type of damage.
If you find any type of burn damage on the resistor block and connector, you can conclude they are bad and need to be replaced (and skip the continuity tests).
OK, let's get started:
Disconnect the blower motor resistor from its connector and remove it from its location.
Visually inspect the blower motor resistor block and connector for burn damage and severe corrosion.
Place your multimeter in Ohms mode.
Check for continuity across two terminals at a time. Continuity should be present between all terminals.
NOTE: If continuity DOES NOT exist between 2 terminals, your multimeter will display the letters OL (Open Loop).
Let's take a look at what your test results mean:
CASE 1: Continuity exists between all the blower motor resistor terminals. This is the correct and expected test result.
If there isn't any burn damage to the resistor's coils or its connector, then you can conclude the blower motor resistor block is OK and not defective.
CASE 2: Continuity DOES NOT exist between some of the blower motor resistor terminals. This test result tells you that the blower motor resistor is defective and needs to be replaced.
If the resistor block's connector is damaged or is melted, it must be replaced with a new one.
Where To Buy The Blower Motor Resistor
Since it's common for the 5 terminal resistor block to overheat and melt its connector, I've also included the link to the connector.
The 5 terminal blower motor resistor block, for the Dodge Dakota isn't expensive. The following links will help you comparison shop and save a few bucks:
More 4.7L Dodge Tutorials
You can find a complete list of 4.7L Dodge tutorials in this index:
Here's a small sample of the tutorials you'll find in the index:
- How To Test The MAP Sensor (2000-2001 4.7L Dakota, Durango).
- How To Test The Throttle Position Sensor (2000-2007 4.7L Dodge).
- How To Test The Fuel Injectors (Dodge, Jeep 4.7L V8) (at troubleshootmyvehicle.com).
- How To Test For A Blown Head Gasket (4.7L Chrysler, Dodge, Jeep) (at troubleshootmyvehicle.com).
- How To Test The COP Ignition Coils (Chrysler, Dodge, Jeep 4.7L) (at troubleshootmyvehicle.com).
If this info really saved the day, buy me a beer!