The Old and The New, Blower Motor Resistor

[SyntheticShield]

After replacing my blower motor resistor, I can see why the OEM ones are so prone to failure. I took some comparison pics so you can see what I mean. I had to superglue the old one back together because I had to break it in order to get it out.

The Old Blower Motor Resistor:

The New Blower Motor Resistor:

The new one appears much better build to deal with and dissipate heat. So Im hoping I dont have to get back under there any time soon. I had been a long time without fan speed #5. Finally, due to the ignition switch, I lost other speeds as well so I just knocked them both out and replaced them both. Its good to have all my fan speeds again.

 

[Toasty]

After replacing my blower motor resistor, I can see why the OEM ones are so prone to failure. I took some comparison pics so you can see what I mean. I had to superglue the old one back together because I had to break it in order to get it out.

The Old Blower Motor Resistor:

The New Blower Motor Resistor:

The new one appears much better build to deal with and dissipate heat. So Im hoping I dont have to get back under there any time soon. I had been a long time without fan speed #5. Finally, due to the ignition switch, I lost other speeds as well so I just knocked them both out and replaced them both. Its good to have all my fan speeds again.

it's kinda funny that you lost 5 first, then the rest... thats backwards!

 

[SyntheticShield]

Yeah, which is why I lived with it so long. I never could get a clear answer as to why that happened that way. Most loose 1-4 and 5 still works. But blessed me, I got the weirdo.

 

[Toasty]

Yeah, which is why I lived with it so long. I never could get a clear answer as to why that happened that way. Most loose 1-4 and 5 still works. But blessed me, I got the weirdo.

mine lost 1-4, like normal... went a few months with just 5...then nada, nothing at all.


replaced the resistor, and all good all around.... odd

 

[Chleby]

mine went without 1, than I lost 5, then I lost the rest...even weirder

 

[SyntheticShield]

If it werent so blasted hard to get to I would buy another one and do some experiments to find out how that all comes about, but I aint getting back under that dash and fighting with that thing right now.

 

[TyroElite]

Is that whole unit just one resistor?

 

[SyntheticShield]

They are both complete units.

 

[Toasty]

If it werent so blasted hard to get to I would buy another one and do some experiments to find out how that all comes about, but I aint getting back under that dash and fighting with that thing right now.

actually, looking at the schematics, it's pretty easy to see how these different scenarios could occur.

 

[SyntheticShield]

Is that a fuse between each of the resistors? It does make more sense now seeing the diagram.

 

[Toasty]

Is that a fuse between each of the resistors? It does make more sense now seeing the diagram.

yeah, it certainly is written that there is a fuse inline with each resistor.

 

[SyntheticShield]

Now thats certainly odd because I see the 4 fuses on the old pack, but not on the new one. There were a couple external devices on the new one (one of them you can see at the top of the pack) and I didnt pay them much attention but I thought perhaps they were diodes to prevent reverse voltage as the motor engaged but I guess they could just as easily be fuses as well. If they are fuses, there certainly was not 4 of them on there.