Fan switch not working inside car for heater all fuses are good still not working blower will not come on.
have the same problem?
Thursday, March 10th, 2022 AT 1:30 AM
All fuses are good for heater, but blower still won't come on inside the car when I turn it on.
Thursday, March 10th, 2022 AT 1:42 AM
Can I run a direct wire from the heater fuse to the battery to see if it will come on?
Thursday, March 10th, 2022 AT 1:43 AM
Hello, no that's not a good idea, it's never a good idea to run power wires which are not build into the vehicles systems. You can use a 12-volt automotive test light to check for power at the blower motor. You'll see there's two wires going to the blower motor. A purple wire and a black wire. The purple wire should have 12 volts on it with the blower on high and should light up the test light.
There's also a Blower Motor Relay which energizes the circuit and a blower motor Resistor block that limits current flow to change the blower motors speed. Since the age of the vehicle, its most likely the blower motor or the Resistor block have failed. I'll put a wiring diagram below so you can see what wires you're testing. As well as a guide for using a test light or multimeter to diagnose the problem.