Fan speed switch not working.

Sounds like same issue as mine. Still haven't found the cause. But one good wack on the fan housing and it's been working since. (Knock on wood) .

Here's my thread. Has some info in it...

https://www.tacomaworld.com/threads/hvac-blower-intermittently-not-working.406398/

 

Just had to do my resistor also easy peasy

 

Solved my issue the same way. A good knock and it's been going ever since. Not sure how long it will last, but thanks to this thread I've got a pretty good idea of how to implement a more permanent fix (clean the gunk out of it). I'll leave well enough alone for now.

 

Mine quit working on the other 3 speeds this AM and would only run on High.
Made an appointment with local neighborhood wrench who was going to fix it this Friday, but went out and jiggled it and "lo and behold" it came back on all 3 speeds plus High!! Don't know if someone had touched it with their foot or.....???
Anyway it is back on for the time being.
Thanx TC!!
Ya'll rock!!

 

I'm new here and have read through this thread, but I couldn't find if anyone answered Hadoken's question. Perhaps I missed it. I'm having the same issue. My AC would come on intermittently, but now won't come on at all, at any speed. Could that be both a bad resistor/connector and relay? Or is it likely just the motor?

Thanks!

 

To make it simple. First check the IG1 NO2 Fuse it is rated at 10 amperes. Check the 50 ampere heater Fuse also. If both of those are good you should have 12 VDC at the blower on a black wire with a yellow stripe by my prints. You need a voltmeter set to read DC Voltage and then verify that you have 12 VDC at the Blower Fan on the Black wire with a yellow stripe. NOTE: This voltage will be there regardless of the fan speed selection. The ground is what is regulated through the resistor block.

 

Hello All.

I have a 2012 Tacoma.
I've been trying to solve a fan switch issue. I've read this whole thread, done a variety of tests and have come to a conclusion.

Symptom: Fan / blower will not work. Not on any speed.

I've checked the blower motor. It's good.
I've checked the resistor, it's fine.
I've checked the wiring harness that connects to the resistor. No burnt or discolored leads.

I've checked the wiring lead by the resistor and there is no power at the connector.

So what to check next?
Where is the heater fuse located?
- I've checked the fuses inside the cab.
- Isn't there one in the main fuse area in the engine bay?

Is there are relay that could be sticking?

What about the in dash switch itself?
- Could that be the problem?

Thank you in advance for any help you can provide.
Q~

 

Fuses? The high setting should be hot all the time ign is on.

 

That' what I'm thinking. But isn't there a 50amp fuse in the engine bay fuse block?
What about a relay? I think there is one too.
I'm just trying to verify their locations before I start pulling on things .

Thanks.
Q~

 

Someone may have a diagram of that. I have nothing for a 2012. Pop the cover on the fuse block,it should have them listed.

 

@Questor Here's a clip from the 2006 diagram.

 

Yes there is a 50 ampere fuse in the engine bay called "Heater".

 

Perfect! I'll go check that this evening when I get home.
I'm still hopeful that the simplest solution is the correct one.

Thank you.
Q~

 

Well my fan just started showing the same symptoms today for the first time! Glad to see it's such an easy fix. I may wiggle the wires there first as I was sitting in the passenger seat streatched out cleaning out the glove box this morning BEFORE I drove the vehicle. Either way it doesn't look like it's going to be a big deal! Yeeeeee Hawwwww

 

Hello All.

I'd just like to post an update.
I checked the 50 amp fuse under the hood and it's good. I even swaped another 50 amp to see if that made a difference. Nope.

Then I swapped out the Heater Relay with a relay from another circuit, and the blower worked!

I guess the relay got tired...
I'll replace the relay, and be happy with my truck again!

Thanks for your help and motivation everyone.
Q~

 

Friday I took out my resistor and wiped the dust off it, clamped the pins on the wireside tighter, took the squirrel cage off of the motor and cleaned everything, then drove to Charleston. It lasted for most of the weekend and then started acting up again. Poking around with the wires to the resistor under the dash in the Target parking lot I noticed that the 2nd from the right wire was the bump and work resolution. For whatever reason I pushed it up onto the resistor more and it moved quite a bit and started working and it's been working all day since. Now that I think of it when I had the resistor out there was only some marking on the very end of the pins, like the connector never seated and made full contact with the pins.

tldr; Try and push the individual wires up through the plug onto the resistor pins. They might not be seating all the way up.

 

This site is unbelievable. 10 years later, I just ran into this problem.
Look familiar ?



Followed the lead of the ones who came before as outlined above and I'm good to go !
Thanks to all.

 

Frito,

This is what you need to fix your problems with the blower: A new resistor assembly and a connector plug, with part numbers on the package. See image below.

Plug Number

$32 82141-04M40

82141-04M40
Resistor Number 87138-04052

 

Thanks Mahn..... that looks like the right way to do things !

 

My motto, Do it right or don't do it at all.