Fan Blower Motor - Resistor ??? (13 Viewers)

[IdahoDoug]

LX,

I'll echo the appreciation for following up and completing the thread. Well done. Sorry it cost you a bundle, but know that some day another of us will benefit from you taking the time to post the result. Are there any aftermarket mods or a history of your vehicle that may have led to this, or was it plain dumb luck?

Regards,

DougM

 

[Nomis]

LX,

Are there any aftermarket mods or a history of your vehicle that may have led to this, or was it plain dumb luck?

Regards,

DougM

The rig is bone stock, with no previous problems of this nature. On the bright side I saved about $300 by buying and replacing the part myself.

 

[shack]

I had my entire AC unit taken apart earlier today to replace a bad expansion valve and now upon putting everything back together I am noticing I only have fan speed "HI".

My system is currently not charged. Where should I look first?

 

[shack]

Disregard. Just realized I left the little black connector that goes to the condenser box unplugged.

 

[RWD]

Thanks to all that contributed to this thread. I know it's old but it helped me resolve my problem with my 97 LX 450 with climate control. When I started the truck, it would take a few minutes to warm up and then the blower motor would go to the highest speed. The speed indicator lights for the climate control would vary and the buttons had no effect on blower speed. I was able to remove the blower motor resistor and check it for the proper resistance, 1.8-2.2 ohms according to the FSM.

My blower motor resistor measured 2.174 M ohms so that was bad and I ordered a new one.Toyota part # 87138-60230

 

[RWD]

Taking the old resistor out is a pain but do-able if you have the right tools.

I did have a problem trying to get the new resistor in place because the corner of the a/c duct in the way. I guess you are supposed to drop the whole unit but I was able to cut the corner of the plastic duct/box off giving me enough room to slide the resistor past it.

I put it all back together and it still didn't work. Same problem, only has high speed blower.

 

[BullElk]

Probably need to check the white box above the accelerator pedal. Two screws hold it on. The circuit board inside the white box is probably wet.

 

[RWD]

So after reading more threads here, I was able to figure it out as a bad A/C power transistor. It's located right below the blower motor resistor. A new transistor was about $260 or more so I found a used on online for $35.

Here it is in place:

More info from the FSM:

So after all that I have all speeds back and everything works again! Not bad for a under $100 fix!

 

[RWD]

A shot of the blower motor resistor:

and the A/C power transistor:

The blower motor resistor goes in this hole:

And the power transistor goes here:

 

[RWD]

My readings from the old blower resistor (bad):

And the new resistor (good):