How does the Ford blower motor switch work?
This battery power is now diverted to terminal 4 (YEL/RED wire) of the blower switch harness connector. In tech speak: circuit 2 and 4 is now considered ‘closed’. In tech speak: circuit 2 and 3 is now considered ‘open’. The end result is that your Ford’s blower motor now runs in M2 speed.
How can I test the blower motor switch?
This is good and is the correct and expected test result that tells you that the blower fan switch (in the A/C-Heater control panel) is NOT defective. Your next step is to bypass the blower resistor using a simple jumper wire. For this test go to: TEST 2: Using A Jumper Wire To Bypass The Blower Switch.
What kind of motor does a variable speed blower use?
Variable speed blower motors don’t use a blower motor resistor. Instead they use a blower motor speed control or a power transistor. Variable speed motors are most often used in vehicles with automatic climate control.
Where can I buy a blower control switch?
To comparison shop for the blower control switch, take a look at this section here: Where To Buy The Blower Switch And Save. CASE 2: All circuits tested had continuity where indicated in the test steps.
Where does the battery go in a blower motor switch?
The BLK/ORG wire is the one that connects to terminal 2 of the blower motor switch. Inside the blower motor switch this battery power goes nowhere. Battery power is available on terminal 2 of the blower switch connector (BLK/ORG wire). This battery power is now diverted to terminal 3 of the blower switch harness connector (LT GRN/WHT wire).
What’s the speed of the blower motor switch?
This battery power is now diverted to terminal 3 of the blower switch harness connector (LT GRN/WHT wire). In tech speak: circuit 2 and 3 is now considered ‘closed’. The end result is that your Ford’s blower motor now runs in M1 speed.
How does a blower motor work in a car?
Carmakers use these three common wiring methods to supply power and ground to the blower motor in a manual system using a blower motor resistor. In one design, the car maker supplies battery power to the speed switch, which switches the power to the appropriate connection on the blower motor resistor.
What is the function of the blower motor relay?
The blower motor relay is the electrical switch that is used to supply the power for the vehicle’s blower motor. The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems.