Maybe the blower motor 3 speed switch is okay, and the problem could be the resistor was overloaded by me putting a little bigger fuse in there? Has anyone heard of this ? Do I have to buy a whole new blower motor because the resistor is part of the motor? or can I just replace the resistor? I know that the previous owner had the blower motor and 3 speed switch replaced a few years ago. I have the recipts for them . Man its rough without air cond. in 95 degrees , Did anyone else hear of a 30 amp repair kit for the blower fuse that they sell? Its easier to work on blower motor than that stinking switch. Keep in mind my blower motor works because I ran jumper wires to it to test it , as I explained in my previous post. This is confusing. Thanks for any replies. Stay cool Hans.

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A couple of Ford pickups F 150,250, 350 missed.
1983 240 D 256,000 miles ,auto, ac.

Any takers on this one? It sure is hot out, I really dont want to run a seperate un stock toggle switch, I really would like to fix this right the first time. Thanks. Hans

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A couple of Ford pickups F 150,250, 350 missed.
1983 240 D 256,000 miles ,auto, ac.

Hans - The blower motor has a pre-resistor, a separate unit and it is located somewhere between the 3-way switch and the blower motor behind the dash on the fire wall I am told. Can't tell you exactly where as I looked for and could not find it and later found my problem was brushes. No need to remove the 3-way switch - follow the cable from the blower motor - you may have to pull the dash foreward.
Have you checked your brushes? When they wear right down they will deposit a copper ring around the armature which will blow your fuse.

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Beagle

I had a similar problem with my '82 300CDT.......the fuse was blowing after several minutes with the heater blower fan on. I wish my problem was with A/C use but unfortunately my compressors is seized.

Anyway, I purchased an auxiliary fuse (I think its 25 or 30 amps) from performance products, had it installed and that did the trick.

Hope this helps

I started with the standard 16 amp that blew with ac blower on, about every couple of days . Then I went up to 24 amp , and it blew after a couple of days. Then I tried one more time and then after coming out of the store I turned the car on and the blower did not come on. I opened the hood, the 24 amp fuse did not blow but , so now what ? I took the two prong black plug of the blower motor and ran jumper wire directley to it and it would run . So I know blower motor it self is okay , Now I am thinking the switch is bad, I know the switch and blower were both replaced not long ago.There is this xtra resistor in or around the blower motor right. I will take the motor out and see what I can find. I think that the 24 amp fuse might have blown the resistor? I dont know what else to check. Hans

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A couple of Ford pickups F 150,250, 350 missed.
1983 240 D 256,000 miles ,auto, ac.