Blower fan for heater not woking?

Need to check for voltage at the blower when turned on. If there is no power you need to back track starting at fuses. Check them with a test light to verify.

You must have a bad ground or the power feed has failed. Here is a guide and a wiring diagram to help us get the problem fixed. Also recheck the relay and check for power there.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

and

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If the system does not have power check the main fuse #56 60 AMP

Please let us know what happens.

Cheers, Ken

Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken

Before you replace the blower motor, check these fuses first.

The person who put the radio in instead of buying the connector so you can do this right, has probably crossed wires or cut them going to your heater giving you the problem you have now. Have a local mechanic try to fix the wiring and hopefully you have ruined any modules that relate to the heater.

Please get back to us so it can help others

Hi celticone1,

The clogging should have nothing to do with the blower fan motor as the evaporator housing connected to blower motor is rather high and would not allow water to flow to the fan motor.

To unclog the drain hose, try pinching and squeezing it from the firewall in engine compartment and if water is able to be drained off, the job is done.

Otherwise you would have to disconnect the hose from beneath the evaporator housing and use a piece of wire to clear the clogging.

The PCM is below the drain hose so care has to be excercises to prevent water from getting to it while probing the drain hole.

As to the blowe fan motor, it has probably called it quits and needs to be replaced. With blower turned ON, try banging the housing and if motor starts working, it is in its final stage of wear and would have to be replaced.

If it does not work, test the blower motor connector for voltage with ignition switch turned ON. One of it should have power, if both do not show any voltage, check blower fuse in underhood fuse box.

Pull the connector off the blower motor. With the fan switch turned on, there should be power and ground at the connector. If it there is both power and ground, replace the motor. If there is not, check your fuses and wiring.

Hi milkman0223,

Possible causes.

1. Air mix door not working correctly. Check linkages.
2. Heater coolant hoses clogged.
3. Heater coolant valve not opening due to cable out of adjustment or vacumn hose dislodged or broken. Faulty control valve solenoid.

Check for battery voltage to the blower fan motor with ignition switch turned on. If voltage is available, the fan motor is most probably bad. Bang the blower motor housing with your hands to test if the blower starts working.
Turn the blower to max speed and if blower motor turns on, the blower resistor is bad.