bryanr

Brr! Today was the first day I needed to actually use the heat in my 89 truck. However, I noticed on the first 2 blower settings, nothing at all was coming out. The higher 2 settings pushed out a lot of air and seemed to work as intended. I assume the blower switch is what is likely to be the problem? Is it pretty simple to R&R?

Thanks.

eric-the-red

Could also be the blower resistor that has gone. It is just below the heater assembly, should have 4 wires attached. It adds or removes resistance from the circuit to control the motor speed. Check that first.

The black/white wire is the ground, and there should 3 different resistances between that and the 3 other wires. If you find any open circuit between the ground and one of the other 3 wires it's toast.

humboldt

The third blower setting on my truck had never worked. One day the switch was just frozen. I replaced the switch which had fused itself stuck and the third blower setting works now. Could be the switch or the resistor.

Snorkeldepth

I hope Roger doesn't mind:

http://www.4crawler.com/4x4/CheapTri...BlowerResistor

garrett1478

i think these guys answered you already, but you can read this thread just for kicks. the guys response is amusing

https://www.yotatech.com/forums/f28/t-100-heater-fan-hi-speed-only-67624/

Dublin

The fan speed switch for my temp control has been a problem eversince I brought my rig. Twice a year I replace the switch because of the loss of a speed setting and eventually all speeds. Each and every time the switch had melted and fused into an unrecognizable blob. I replace this switch so often I have 4 more on hand. I've checked fuse size, wiring and even did some testing on potentual power surges. Any ideas? The screws holding everything together may as well be velcro.

jahMcS

I have changed out the switch several times, and its the same thing, it shorts out. It appears to have a small spring and bearing in the switch for the indents. If falls apart and shorts out the switch. I spoke to a Toyota Rep in Houston, and they don't seem to have any concern for the switch. They sell lots of them, the dealer that I vist always has them in stock.

bryanr

Thanks for the responses guys. I am going to pick up a new blower switch and I assume that will fix the problem.

On topic, I don't have a FSM. How easy is this to replace? Anyone have a guide for this or is it pretty straight forward?

Thanks.

jahMcS

Its not hard, you have to take the a/c panel down to get to the switch. I think the switch or the housing has a tab that has to be release on the top side of the switch, then it will come out. I used very thin metal to slide between the top of the switch and housing, it came right out.
There is a pic of how it look during the removal/intall.
http://img418.imageshack.us/img418/3...dium1vc1tw.jpg

bryanr

Thanks jahMcs!!

bryanr

I assume this is what I am looking for?

http://www.partsamerica.com/ProductD...pe=430&ptset=A

They don't list that switch for an 89, but do you think it would be the same for a 95?

humboldt

That looks like it but for that price, I'd get the OEM toyota switch from a toyota dealer.