Fan speed switch not working.

Yes it is most likely a defective terminal at the connection to the resistor.

 

It has been a week and my new resistor and wiring harness are working great. I bought the Dorman kit from Amazon for $22.

 

I'm a newbie on here with the same issue on my 2008 Tacoma - fan only works on high speed. Just ordered the Dorman kit from Amazon myself. Hoping it's not too complicated to replace.

 

Try resistor it's an easy fix

 

Like others, I removed the passenger seat for my mobility. Removing the 2 screws that hold in the resister was fairly easy. Re-installing the back screw was challenging. Kinda blind and I was on my back just trying to feel my way around. I love this fix. Didn't know how much I use the lower fan speeds. Attached are some notes and photos from various posts here on TW.

 

Wow, I totally just made sure the wires weren’t loose and it started working again. My symptoms were just blowing on HI.

 

If your connector has a burnt spot like my did (see photo), then it is not just loose wires. One of my wires was also compromised. I wish you well that it was just loose wires, but just in case it starts acting up again.....

 

Yep so far so good. This will be my next thing to inspect if it goes bad again.

 

The way you wired yours worked perfect for me. Thanks for taking time to write it up. This was the only thing I could find on how to rewrite the new plug. Thanks again!

 

Well finally did this as well. Thank you for all the postings. I bought the Dorman kit on Amazon about a month ago. Mine has been on/off working on only the high speed for sometime but recently it’s almost full time only. I didn’t replace the wires as they seemed ok and I was short on time. Just replaced the resistor and so far works. I’m a FL so need to have this working. Was a quick and easy fix, except for that rear screw.

 

Has anyone actually fixed this permanently? I took my truck in and they replaced the resistor and it started happening about two weeks later.

I took it in again and this time they said I had to change the blower motor and the wiring harness/connector. They wanted $500+ to do the change. I am hesitate to do it and only have it stop working a few week or months later.

 

The guys/girls at the shop are a bunch of morons. You made no mention of the resistor connector, so I'm gonna assume they didn't replace it. You have to replace the resistor and connector at the same time. It's about a 20 minute/2 beer job. 30 minutes if you make it a 3 beer job.

$500 is highway robbery for whatever they plan on doing. Read here on TW and fix it yourself.

 

So was this the right way to wire the new square plug?

Update :
Wired it this way in my buddies truck and it worked great. Just fyi for anyone else with this issue on the new plug

 

I know people are having issues with the fan switch only working on high. The problem with mine is that high does not work. All the other speeds to but not high. It blows out very little. I've looked at the connector and nothing looked burned.

Any thoughts on whats going on or where to look next?

 

OK, so I've been banging my head against the wall the past two weeks because I purchased the latest resistor and square plug to fix the issue of my fan motor only running on high. None of the threads or Toyota dealerships I talked to had the right answers on how to wire this new square wire harness plug for my situation. So after trying many different ways, I landed on the wire combination below that gave me four distinctive fan motor speeds. The wire colors connected between the old wires and new wire harness make no rational sense and the pin out numbers between the old and new plug do not line up. But it works and hopefully this helps someone else fix their issue as there seems to be little information available right now on how to wire these new plugs and resistors (latest generation of Toyota OEM).

My specific situation is I have a 2011 Tacoma with the flat plug and bad resistor. I replaced with the part numbers below. Results and situations may vary but the wire connections below worked for me.

Blower Resistor Pt.# 87138-04070
Wire harness Pt# 82141-04Q80

Wire connections:

Old wire harness color >>> new plug wire color

Green/Yel >> White
Blue/Black>>Green
White/Blue>>White/Black
White/Black>>Blue

 

So I've been scrolling for a little looking for the answer (look with your eyes and not your mouth, right?) but haven't been successful. I was having the issue of the switch only working on high two weeks ago, so I swapped out the resistor and ram bam thank you mam I was back in business. Today, two weeks later, the fan is back to only working on high. I assume this is a symptom of a larger issue, but I'm not savy enough to figure that junk out on my own.

Any ideas? Thank you!

 

You have to replace the resistor and the resistor wire connector at the same time. Otherwise, it's like treating 1 kid for lice in the 3rd grade classroom.

 

So none of this made any sense with all the numbers and colors and letters. I went to Toyota today and worked it out with them. This is the proper way to hook it up. I agree that it does not make sense that you would have a larger gauge wire hooked to a smaller gauge wire. However, Toyota made it this way. Hooked mine up this way and it works like a champ. I attached the diagrams that the Shop foreman printed out for me. Hope this helps if anyone is still trying to figure it out.

Old Harness -> -> New Harness
White/Blue Stripe -> (Hi) -> Solid White
White/Black Stripe -> (Lo) -> White/ Black Stripe
Green/Yellow Stripe -> (M1) -> Solid Green
Blue/Black Stripe -> (M2) -> Solid Blue

 

Finally, somebody posted the correct wiring with documentation to back it up. So, you just match the white/black to white/black and then from there, you just ignore the stripe colors and match color to color.

Good job Choads!

 

and here I was just lining up the wires from left to with the clip oriented towards me... There's just no help for some people!