Fan Blower Motor Stopped Working.

[Sooty74]

Hi, I am really hoping that somebody can steer me in the right direction please. The Fan Blower Motor in our 2004 - 105 doesnt work. It is the Fan blower motor under the passenger side dash that blows air out of the vents. I used to own this car and I sold it to a mate. He had it for three years and I've purchased it back from him with the blower motor fan not working. I just thought it would be a fuse or a relay and an easy fix. I have checked every fuse. And I have double checked and even swapped out some relays. I took the cover off of some of them to make sure they make contact correctly. I have also installed a new resistor ( $240 ) as from what I read this can be the cause of the blower motor not working. The dash switch seams to be working as the relays all turn on and off correctly. If I power up the blower motor fan with a jump wire it runs fine. I am not getting power through to the Resistor and I do not know why. I do not know what else is in this circuit or why I would not have any volts at the resistor plug or any power at the blower motor plug. Any advice you can give me please would be greatly appreciated.

 

[Shayne]

Before i spent that much on a resistor i think i would have rewired it to run separate from the main loom like put a fuse in your jump leads .

 

[Sooty74]

Hi , I am still trying to fix this Blower motor fan fault. I have an update. As mentioned previously I have installed a new fan resistor. Also the low speed, medium speed and high-speed relays all work and function as they should but the fan blower motor doesnt run. I have also replaced the heater relay in the engine fuse box. The reason I did this is that when I use a jumper wire with a fuse in it between terminals 3 and 5 on the heater relay the blower fan runs and functions as it should on all its different speeds using the fan control switch on the dash. But with the new heater relay in there the fan blower motor still doesn’t run. In between terminals 1 and 2 in the heater fan relay I only measure six volts with my multimeter. What could it be please, what would you change, or what would you try to get the fan running please?

 

[Shayne]

Seems to me that you have done everything but remove the fuse box . I'm reminded of someone who had a different electrical problem eventually tracing it back to corrosion behind the fuse box .

 

[Hendrix]

Check that pin that's bent on mine. Thats the terminal connected to the positive on the crank battery

 

[CyprusPete]

Have you verified that the switch
A. Has power coming in
B. Has power going out

A resistance check between the appropriate terminals will help determine if the switch is bad.

 

[Sooty74]

Hi Everyone, thankyou for your info and suggestions. It is now fixed. There was a fault in the circuit board of the AC module. Swapping the AC module out fixed part of the fault. But there was also a fault caused by some corrosion in the fusible link connection as well as this fusible link connection not being fully pushed in and properly connected. Hence the 6v reading across the relay. Once the fan blower motor was operating as per normal, the AC compressor clutch was then not engaging when the AC button was pushed with the engine running. This fault turned out to be a broken wire in the Temp sensor located on the AC pipe on the front of the car. Fixed that wire and everything works now. Nice cold AC just in time for an hot Australian summer. I am not saying I am an expert in the Toyota AC systems but I have learnt a lot about them with these faults. If you have any questions please let me know. I am happy to help and try and pay it forward.

 

[CyprusPete]

Excellent! Glad you got it sorted