Fan speed switch not working.

First, PROPS to Gordon-Gekko! I just pulled my motor, cleaned it, and now it works great at all speeds. I cheat cleaned it, just sprayed some mass-airflow sensor cleaner through the big hole, spun the motor, drained, and repeated until it ran out clean. First few flushes were BLACK. Did not bother to actually go into the motor and pull brushes/springs - just sprayed and drained several times. Did not even bother touching the resistor/plug thing. Added a drop of light oil to the bearing, before reinstalling.

Yotagang, I've got fairly strong fingers/hands/forearms, and my plug did not want to come out either. I eventually put a flat-blade screwdriver between the housing and plug, right where the release tab is at. While pressing the release tab with one hand, I twisted the screwdriver with the other, and the plug popped right out.

IMHO, the dirty fan motor is what causes the resistor/connectors to overheat. I actually cleaned the resistor/connectors maybe 18 months ago, but the problem just came back in the last week.

 

Sweet, I'll give that a go. Thanks man!

 

I will have to try the MAF cleaner tonight. Mine quit working this afternoon for the second time in a year. I can see where my connector has some "burn" marks but last time I just cleaned the connection and it worked again. I will pull the motor and clean along with the connector.

Thanks!

 

What causes the terminal connectors to overheat is the loose connection between the male and female terminals. A loose connection has excessive resistance and acts like a heater, this is what burns the terminals. If it were an excessive current issue the entire wire would have the insulation melted.

 

Hello all, My 2015 AC/heater will not blow hot or cold air (nothing comes out not even air). It only blow on high but there NO heat or cold air coming out on high setting.... its just blowing air. Do you guys think its the resistor? Thanks for any help!

 

Pull the plug under the passenger side that hooks to the fan resistor. Look for one of the wires to be discolored, also look for a discolored spot on the plug itself. You can find pictures in this thread to show you what you are looking for and also how to fix it.

Look at the top of this page for a reference to Gordon Gecko how too.

also, this post has the pics

https://www.tacomaworld.com/threads/before-you-replace-the-blower-resistor.107093/

 

Thanks! I will try that and see if thats the issue.

 

Okay the Blower Motor Resistor ( part # 87138-04052) was bad, changed it out with new one now work again!

 

Did a thing on Sunday (Watch video below)...had a bunch of water come over the hood and get sucked down through the vents (had water on passenger floor mats). Fan was working ok for the rest of the day. I noticed my Fan stopped working on all settings the next day though. AC light still came on and Recirc as well. Could feel the compressor kick on when I turned the speed dial while parked as well. So everything was working fine other than the actual fan kicking on.

Took out the resistor and ran a multimeter across it. Everything checked out fine, cleaned it and reinstalled. Tested fan again and nothing on all speeds... Brought out the trusty Dodge repair tool and smacked the blower motor housing 2 times, while fan was on High. Everything went back to normal. TLDR: Fan stopped working on all speeds. Used hammer, issue fixed.

 

Bump, looking for an answer. I know this thread is about the fan only working on high. My fan on my 07 recently has been acting up. While driving yesterday I had the fan on the 4th position. At random times the fan would shut off for 10-15 seconds and then come back on. This morning after letting it run and warm up a little before leaving, I was pulling out of my driveway and it shut off again for 10 seconds then came back, the shut off twice more before it started working properly and didn’t shut off until I shut it off myself. Anyone have a clue as to what’s going on?

 

Bump, it’s completly out now. Only off of high, A/C works though. Anyone have pics of removal of the resistor? The original photos are gone?

 

its only the heater thats not working? the A/C works on all speed?

 

https://www.tacomaworld.com/threads/replacement-of-hvac-blower-motor-resistor.8310/

 

Both A/C and heater work only on high. I said off because I concider that a setting, if that confused you.

Thanks. Seems Toyota is 2nd cheapest out of the three I’ve found for replacement. Dorman’s is a DIY, and Bosch is $52, my local dealer said $38.50 and has it in stock. I’ll be purchasing either later today or tomorrow and replacing. Seems super easy judging by pictures.

 

Okay thats a bad Blower Motor Resistor ( part # 87138-04052). Might want to check to make sure its the right part for the 2007.

Toyota Blower Motor Resistor - 87138-04052

https://www.amazon.com/Genuine-Toyo...F8&qid=1517611969&sr=8-1&keywords=87138-04052

 

Rock Auto has a few cheap selections

 

That works for my 07, and looks to be true OEM, probably gonna purchase now.

Looked on Rock Auto as well, cheap one on there for $16 but it’s not OEM, for only a little more, I think I’ll settle on the OEM one.

Thank you both for the info.

The other thing is it hasn’t been working all day and now all of the sudden it will work on all settings, should I replace or is something else wrong? Could it be going out slowly?

 

Have you pull the white connector that plugs into the blower and looked for signs of overheating like this? It may not be your resistor.

 

Nothing there


But noticed the blue striped white wire coming from the resistor plug has overheated and burnt the plastic before.

 

I bought both the new resistor and the replacement plug. If you read back far enough in this thread you’ll find that Toyota upgraded the resistor at some point. Turns out my truck already had the updated resistor and the plug was burned pretty bad. I went ahead and installed them both and have had no problems since.