How to test the blower fan control switch?

How to test the blower fan control 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 OK. 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.

Can a GM blower control switch be replaced?

This is no cause for concern since the circuit descriptions are the same for all of the GM vehicles covered by this repair tutorial. You don’t have to buy the whole A/C-Heater Control Panel to replace the blower control switch since the switch is removable. You can find the blower switch just about in anywhere.

Why is my blower control switch not working?

If continuity is not present where indicated in the test steps above and this lack of continuity coincides with the blower fan speed that’s not working on your pickup or SUV, then you’ve found the cause of the problem. Replace the blower switch in the A/C-Heater control panel with a new one to solve the problem.

Why does my Silverado fan only work on 3 + 4?

I have an 01 Silverado and the fan only works on 3+4, so a solution would be very helpful if anyone knows one, thanks It’s probably a bad blower motor resistor. I would replace the blower motor as well. Usually what happens is the blower motor gets worn bearings/bushings and pulls too many amps, which in turn burns the resistor out.

How to replace an AC blower control relay?

Simply remove the screws, unplug the electrical connector on the resistor and the pigtail that secure the blower motor resistor from the blower, remove the resistor or heater control relay assembly, and install the new resistor in place. OEM Fit, Quality, Finish – All mounting ports and sockets on the resistor are identical to your factory part.

How to test the blower control switch ( GM )?

Basics Of Troubleshooting The Blower Control Switch. TEST 1: Checking Continuity Of The Blower Switch Fan Speeds. TEST 2: Using A Jumper Wire To Bypass The Blower Resistor. Where To Buy The Blower Switch And Save. Related Test Articles. This tutorial compliments this one on testing the blower motor resistor:

What does the control switch on the blower do?

What this means in plain English is that as you turn the blower fan speed knob from OFF to any of the fan speeds (LO, M1, M2, and HI), the blower switch mechanically opens and closes the two contacts necessary to divert the incoming battery power (from circuit G) to the different circuits that’ll get the blower fan speed you’re choosing.

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 OK. 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.

How can I find out if my blower switch is bad?

To find out if the blower switch is bad you can do two different tests. One is to do a multimeter continuity test of the specific circuits that should be ‘closed’ when you turn the dial to the different blower motor speeds. The other, explained in TEST 2, is to bypass the blower switch and indirectly test the blower switch.

Where can I get a new blower motor resistor?

With over 1,000 blower motor resistors in stock, Autozone is ready to provide you with the blower you need, no matter what type of car or truck you drive. If you need a new blower motor resistor for your car or truck, shop with Autozone today to get a high quality replacement you can count on.

How to test the blower control module 3.8L?

Where To Buy The Blower Control Module And Save. TEST 1: Verifying The Blower Control Module Is Getting Battery Power And Ground. TEST 2: Bypassing the Blower Control Module. TEST 3: Verifying The Blower Speed Voltage Signal. More 3.8L GM Tutorials.

What is the fan direction selector on a VT Commodore?

The fan “vent direction selector” (the knob that chooses face, feet, windscreen, face/feet, recycle air in cabin) is no longer working in my VT commordore.

Can a blower switch be replaced in an A / C heater?

Replace the blower switch in the A/C-Heater control panel with a new one to solve the problem. 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.