Blower motor resistor

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Feb 27, 2003 | 04:05 PM

Big 89 Bronco

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Blower motor resistor

Hey I got an 89 bronco with a bad blower motor resistor. At first it wasn't a problem but now i've replaced all the dash board swithes and the blower motor so i'm pretty sure thats what it is. My problem is that i can't find one anywhere all the parts store guys tell me that they(the resistors) never were reliable and ford had problems with the reisitors lasting. So, I can't find them anywhere has anybody found them, know where i can find them or have them that i can buy one or a couple. Its pissing me off that i can't find one. Any help is appreachated.

Feb 27, 2003 | 04:19 PM

Steve0

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Blower motor resistor

The only part that the parts stores carry is the blower motor switch that is in back of the dash control. I called around and the local Ford dealer had them for like $30. I went to the junkyard and pulled one from a '88 F-150 and it was identical to my '92 Bronco. Just cleaned it off a lil and popped it in. Worked like a charm.

The air in my Bronco would only blow on high and after research guys were telling me it was the resistor. After I pulled the old one out I saw that one of the filaments was burned out, the one I pulled from the junkyard still looked good so I just used that.

Check your actual resistor first, you might have some build up on the resistors. If not, Ford or your local junkyard.

Steve0

Mar 1, 2003 | 12:44 PM

Big 89 Bronco

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Blower motor resistor

To whoever cares:
I fixed the blower motor resistor well actually replaced it. $17.60 from my freindly ford dealer. So, now my blower has four levels.

Mar 1, 2003 | 02:45 PM

marshall0351

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Blower motor resistor

glad to hear your blowers working, just remeber when working on blower speed concerns, if hi works but one or none of the others do. chances are great that it the resistor block, hi speed bypasses the resistor block, so if hi speed acts up it's not the resistor block and more like the switch.

Mar 2, 2003 | 01:36 AM

greystreak92

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From: Gateway to the West

Blower motor resistor

I haven't actually visually inspected the "resistor block" in mine but should the component fail and the "block" be a difficult part to find, it would seem that referencing a wiring diagram/schematic would reveal the exact resistor values so that they could be replaced individually. Might require some minor fabrication if the stock resistor block is a sealed component but not an impossible task and if they are prone to failure, doing this could allow for ease of replacement in future or the use of heavier duty resistors. Just a thought. May be more trouble than its worth but figured I'd throw it out there.

Mar 2, 2003 | 11:09 PM

steve83

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From: Memphis, TN

Blower motor resistor

The resistors themselves are stainless high-current high-temp coils crimped into their terminals, so you can't just solder in a Radio Shack replacement of the same resistance.

They're about as HEAVY-duty a resistor as can be found, so don't waste time looking for heavier ones. Besides; they're not that expensive, and you can collect them in junkyards while you're buying other parts.

The most likely failure in that resistor pack is the thermal fuse burning out because of leaves building up in the ducts - not the actual resistors burning out.

Mar 2, 2003 | 11:26 PM

greystreak92

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From: Gateway to the West

Blower motor resistor

Well Steve, I wasn't exactly referring to "radio shack" replacements anyway. .

Like I said, I have never had any need to deal with this component. Besides that, everything can be improved upon. Its just a matter of how far one is willing to go to make the improvements.