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The Blower Speed Switch 5-postion is busted.

Tiny
JACK DAVIDSON
  • MEMBER
  • 1989 TOYOTA PICKUP
  • 100 MILES
I have a 1989 Toyota 5-speed Pickup. The Blower Speed Switch 5-postion is busted. The fan never comes on at any speed setting. The separate A/C button DOES come on in the low-speed setting but none of the other speeds, I got a 3-speed aftermarket switch from Advance Auto but I couldn't figure out where to splice it into the wiring so the fan and the A/C button would both work. Any ideas?
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Tuesday, May 8th, 2012 AT 4:54 PM

14 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the blower motor resistor
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Tuesday, May 8th, 2012 AT 5:12 PM
Tiny
JACK DAVIDSON
  • MEMBER
  • 41 POSTS
I can do that. But I know the switch is busted, There is a definite "click: from "Off" to "Low" and the A/C Switch indicator lights up. It goies off when I move the Blower Speed switch higher and the movement just kinda slides. Anyway. I'll get the test procedures from my alldata. Diy account and check it out. Thnx.
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Tuesday, May 8th, 2012 AT 6:13 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Outside under the hood. Look at the a/c case. Youll find a resister plate it screws into the top of the case with 2 screws and has a wire connecter. Just remove the screws pull it out. You will see a bunch of different size coiled wires these are the resistors. If u look close at the small coils 1 will be burnt. Just google a/c fan speed resistor plate. Then youll no what it looks like.
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Tuesday, May 8th, 2012 AT 6:18 PM
Tiny
JACK DAVIDSON
  • MEMBER
  • 41 POSTS
DAAAANG!
There's a reason I wear my 2CarPros t-shirt and send $ when I can. Which I will be doing as soon as I get pd!

Thnx.
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Tuesday, May 8th, 2012 AT 6:39 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
No problem let me know how it goes
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Tuesday, May 8th, 2012 AT 8:09 PM
Tiny
JACK DAVIDSON
  • MEMBER
  • 41 POSTS
Couldn't find the blower motor resistor under the hood. Alldata. Diy says it's next to the blower motor under the dash. Confused.
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Thursday, May 24th, 2012 AT 1:14 PM
Tiny
JACK DAVIDSON
  • MEMBER
  • 41 POSTS
I also have a new set of Bosch +4 plugs (Model 4428) and wondered if I could put them in this truck.
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Thursday, May 24th, 2012 AT 6:09 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Go to the parts store and ask for a blower speed resistor. Then youll know what it looks like.I dont think its that costly.
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Thursday, May 24th, 2012 AT 8:46 PM
Tiny
JACK DAVIDSON
  • MEMBER
  • 41 POSTS
I think our discussion got crossed up so I'm asking this again?

I have a new set of Bosch +4 plugs (Model 4428) and wondered if I could put them in this truck. Alldata. Diy says operating temp is 392 @ 10 mph to 1479 @ 80 (I think.) I actually drive around 63 consistently but I'm noticing skipping under load (accelerating). I should buy #4478, but I have these 4428(s) already.
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Tuesday, May 29th, 2012 AT 8:21 PM
Tiny
JACK DAVIDSON
  • MEMBER
  • 41 POSTS
The Blower Motor resistor is next to the motor under the dash. I put a new one in and but still doesn't work. Also noted the switch actually DOESN'T work anymore. It moves between "Off" "1st" & "2nd" fan speeds, but no further. The "A/C" button light comes on in "1st" and I get A/C if I'm going fast, but the fan never blows air.
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Friday, July 27th, 2012 AT 6:36 PM
Tiny
JACK DAVIDSON
  • MEMBER
  • 41 POSTS
Been a while. Installed the new Blower Motor resistor. But that ain't the problem. The BM speed switch in the dash is busted. Can't replace that w/o removing all the climate control cables and stuff from dash. Don't really want to try that. Can I install a generic switch between the underdash fuse box and the blower motor using the hot wire? I just want the blower to work even if only one speed.
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Wednesday, January 16th, 2013 AT 6:42 PM
Tiny
CADIEMAN
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Take them to the parts store and have them cross reference the plugs. Then you know if they're the plugs that you need. The resistor plate is mounted inside ac case to keep it cool.
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Thursday, January 17th, 2013 AT 12:10 AM
Tiny
JACK DAVIDSON
  • MEMBER
  • 41 POSTS
1. INFO on plugs - Actually talked to a Bosch tech rep. He said the problem wasn't the temp range, which is what I was scared of. The problem was the length of the electrode-end of that model plug extended to far into the combustion chamber. Everything else about that model plug was ok for an '89 Tyta w/ a 22R (R22) engine. So I put xtra washers to equal the correct length and put'em in. Been working GR8!
2. INFO on BLOWER - Installed the new Blower Motor resistor. Not the problem.
3. INFO on BLOWER - The BM speed switch in the dash is busted. Really not want to remove all the climate control cables and stuff from dash.
4. REAL PROBLEM on BLOWER! - Can I install a generic switch between the underdash fuse box and the blower motor using the hot wire? I just want the blower to work even if only one speed.
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Thursday, January 17th, 2013 AT 2:49 PM
Tiny
CADIEMAN
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1 u needed to cross referance them. Go to the store. Ask for a set of bosch plugs. If the part# is the same u have the right 0nes if not u have to buy the right ones. Those washers need to be removed.2 remove the front panel. Look for screws in the speedo head area. Their are clips that lock the panel down. Use a screw driver to pry it off. Once its off just replace the blower switch in the panel.
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Sunday, January 20th, 2013 AT 9:56 AM

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