Can someone help with a fan blower switch in a 1993 Toyota 4wd?

Question

I have a 1993 Toyota 4wd. It's been a great little truck and I use it for construction and hunting etc. The switch started getting dirty or worn a little while back and it had to be in just the right spot to make the blower motor (fan) come on. Well after wiggling it back a forth trying to get a connection it finally just stopped. It was summertime and of coarse the AC compressor was switched on and off in the process.

The heater and ac works off the same lever when you turn the fan slider on. I checked all of the main fuses in the fuse box and all are fine. I think the motor is fairly new. It seems like I replaced it once before.

I do have the schematic but am really unsure what I'm looking at and hope someone can direct me to the problem.

My question is, is there a relay that could have blown or another fuse somewhere else under the hood or dash or in the kicker panel?

...I'll check the resistor. Any clue as to how much resistance it's suppose to be?

Answer 1

Sounds like the switch went bad...remove the control to access the switch and test for power ....if you're getting power at the switch, replace it (see my final comment first). If not, you'll have to check for a blown fuse or wiring issue. If replacing the switch does not solve the problem, check for a bad blower relay or resistor...relay is for high speed, resistor is for the lower speeds. And check the blower motor itself....test all components for power and a good ground.
Toyota's may have a backwards power circuit, that is, they like to run power to the component first and direct the grounding circuit through the various switches and relays which is the opposite of American engineering although better in some respects. Check a schematic to see how power is supplied.

Answer 2

Did you check the resistor on the blower motor? It lives just under the connector on the blower motor. They cost around $20.00 to replace.