stovetop36

After looking on here I came to the conclusion that my blower was only working on one speed (the lowest setting only) because the blower motor resistor was bad. So I replaced it and for about a day all the speeds worked. Then it was back to having just one speed, the high speed. So I replaced it again worked for a day then stopped again and only worked on the 3rd setting. It was good enough to defrost the thing so I gave up for a while. I have no clue as to why it continues to blow the resistor every time I put a new one in. All the fuses are fine, the motor moves well and quiet when it's on, the switch doesn't seem to have any abnormal movement. I searched on here and couldn't find anyone with the repeating problem I am having. 86' 4runner 22re dlx. Any help would be super awesome!!

wyoming9

iTrader: (1)

By new you mean new out of the box??

Perhaps you have a loose connection or corroded

or got a bad one out of the box.

I have replaced a few over the years that died from old age with no problems.

They just get old and brittle from the thermal cycling a good bump and they break

stovetop36

I bought both of them brand new right out of the box. I know they get old and brittle but, these were not old and hadn't been running all that long. I imagine if there was a short I would be popping fuses or my fan wouldn't work at all.

wyoming9

iTrader: (1)

So these new resistors have failed by melting till they no longer make contact.

The damage is quite easy to see looking at them when you remove them.

Is the plug side clean and tight ??

Do you see any arc marks on either side of the connection??

stovetop36

I will take a closer look at them later on today and try to take some detailed pictures of them.

stovetop36

So after replacing the blower motor resistor a few times (cheap ass part seems to break often, came broken in the box one time, yay for life time warranties) the fan still didn't work properly. So I replaced the blower motor. Still didn't work. New resistor. Still didn't work. I took the switch out and tested out and all connections seemed fine. The problem? At one point a short must have occurred because part of the plastic on the wire harness for the switch was fried. Parts of melted and broken harness caused the harness not to make a good connection. After clearing out the harness of broken bits I connected back up and success! After 5 years of no properly working fan I almost wept.

wyoming9

iTrader: (1)

Well I am glad you found it .

you should be set with all the spare resistors and blower motor.

stovetop36

And I ordered a new switch that I ended up not installing. Spare parts a plenty. Thanks