yeah, when mine went it only blew on the 3rd speed. Then i realized that the po put a 3speed fan switch and a 4 speed coil. So i got a new fan switch and coil and works pretty darn good.

 

So now we're talking about 4Crawler and not DupermanDave, cause Dave didn't say how many speeds his fan switch had.

But it's good to see some clarification, as confusing as it may be to read it.
Nutshell:
4 speed switch has 3 resistors in the unit
3 speed switch has 2 resistors in the unit
number of screws depends on how many people are working on it

 

exactly!

 

I'll add that it looks like a 4 speed fan. I never knew (or noticed) what speeds it had because the clicky thing is broken. My slider just slides across. It doesnt slide and snap into place. Never worried enough about it to fix it.

 

The last year for the 3 speed fan was 1986. Everything build from 87+ is 4 speed.

So assuming yours in the 89, yes you have 4 speeds. Or you are supposed to at least

 

yup. mine's a 1989.Speaking of that slider, I need a knob for the end of it. I lost the old one while cleaning the truck up after the previous owner and lost it. Dealer shouldnt charge more then $5 for it, but you know they will, lol.

 

I had to replace the slider/switch assymebly a while ago... it completely shorted out...

talk about a PITA...

 

yeah, my heat selector(feet,mid,defrost) just broke... now i have to replace it AGAIN.

 

Your resistor is bad! I spent $30 on a new one...and worked fine.

If you take out the resistor you can tell if it is good or bad...the coils will be in tact or broken. My fan only worked on high. LOL.

 

Yeah, I only had hi speed for a time and investigated getting a new resistor but realized it was going to take some time, so I pulled the resistor, cleaned up the broken ends of each burned resistor coil, twisted them together and voila!, good as new... until I get another resistor.

 

anyone ever thought of replacing the coils with an actual electrical resistor I wonder if this would be possable ?

 

If someone knew the resistance values this could probably be done. The only issue might be heat dissipation. you would want make sure that the resistor you used could dissipate enough to prevent it from burning out. You have the potential to put a lot of wattage through it. This all depends on the current draw of the heater of course.

 

Last time I bought one of these they were cheap at the dealer less then $10.00 if I recall.

From getting hot and cooling down the wires get weak over time and break I can`t see why anyone would ever put a used one in there but people do

 

Thread from the dead!

This helped me diagnose my blower issue as the last 2 settings only work.

Would anyone happen to know the part number? It's an 87 EFI (no AC) and ONLY HAS ONE SCREW

The guy from the dealership has to order it but it shows 2 different kinds. Since this is over the phone I cannot make that guess. Any help would be greatly appreciated.


-Jack

 

There is only one screw that holds it in. He should be able to just count the electrical connectors and tell which one you need. I am not sure which year uses which one or the part number, but pull the plug and compare to the picture. I don't know if that is part numbers on them or not.

Copied from my thread...

One thing I have run into in the past. Some have a 3 pronged resistor and others have a 4 prong resistor. Double check as to what you have. Not sure which years used which.

 

I have a very faded 289 on mine. Exactly like the top. 4 Prongs (M1, L, M2, H) but the guy was asking for a 10 digit number.

Anyway he sends me the info (email) the and damn attachments do not work!!!!

 

This might help: http://www.toyotapartsoverstock.com/...modelYear=1987 It will give you the various 10-digit numbers, but I can't tell from the drawings how many prongs they have. At some point, I'd buy the $5.06 one (probably about $10 to ship from Florida) and try it.

The faded 289 is probably just a mold number. Connectors do have a 5-digit code, which is the end of the actual part number.

 

I had the files converted from an online converter and I am now able to see the pictures.

The PNC# is 87138

The thing is there is a list of 3 parts:


Part #, Note. FRev, TRev
88635-89103, (manufacturer note W/Cooler), FREV - 0401, TREV 0590
88635-89103, (manufacturer note heavy heater), FREV - 0521, TREV 0564
88635-89105, (manufacturer note STD Heater or BV), FREV - 0521, TREV 0564

um?

 

I tried to pull the 10 digit part number off of Overstock website on ebay and it would not find anything.

On 88635-89103/89105 and it shows both of them as a 4 prong resistor. It did say it was for the 84-88 trucks but I do remember one of the toughest problems I worked on was getting a 3 and 4 prong resistor mixed up and did not realize there was a difference. I kept thinking I just had a bad resistor until I grabbed a used one out of a parts truck I had and that is when I noticed it.

 

Screw it, buy both and see which one works....

Just my luck - Their system is down and if I order online it will be $67.37 vs $26.xx over the phone