Blower motor confusion
#1
03-02-2019, 10:14 AM
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Blower motor confusion
Hi Guys,
I have a ‘57 f100 with recirculating heat. My switch is a 3 position, 2 speed rotary, off, high, and low. I get full voltage in both high and low positions. The switch also has a cable through it, pushed in for heat and pulled out for defrost. I am missing the rod and diverter that the cable connects to. My two wire, blower motor works on the battery.
My questions are:
1. Where should the blower resistor be for low speed? I can’t find it.
2. When installed, the motor doesn’t work. The schematic indicates two grounds, where should they be?
3. Does anyone have a lead on where to get the rod and diverter to change between heat and defrost?
Thank you for your knowledge.
Matt
I have a ‘57 f100 with recirculating heat. My switch is a 3 position, 2 speed rotary, off, high, and low. I get full voltage in both high and low positions. The switch also has a cable through it, pushed in for heat and pulled out for defrost. I am missing the rod and diverter that the cable connects to. My two wire, blower motor works on the battery.
My questions are:
1. Where should the blower resistor be for low speed? I can’t find it.
2. When installed, the motor doesn’t work. The schematic indicates two grounds, where should they be?
3. Does anyone have a lead on where to get the rod and diverter to change between heat and defrost?
Thank you for your knowledge.
Matt
#2
03-02-2019, 05:33 PM
#4
03-03-2019, 12:27 AM
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NumberDummy,
Since ‘57 F100’s do not have a resistor, does that mean ‘57’s only have a single speed heater/defroster? Should I only have a two position, one speed switch with the pull cable? Any leads on the diverter rod and flap that the cable attaches to? Any leads on a pair of beauty rings for the headlights?
My wiring schematic shows two power leads, orange and red, from the switch to the motor. I am guessing that orange goes to one motor wire and red goes to the other motor wire. Then it also shows two grounds coming from the motor. How do I makes those two ground connections?
Thank you for your time,
Matt
Since ‘57 F100’s do not have a resistor, does that mean ‘57’s only have a single speed heater/defroster? Should I only have a two position, one speed switch with the pull cable? Any leads on the diverter rod and flap that the cable attaches to? Any leads on a pair of beauty rings for the headlights?
My wiring schematic shows two power leads, orange and red, from the switch to the motor. I am guessing that orange goes to one motor wire and red goes to the other motor wire. Then it also shows two grounds coming from the motor. How do I makes those two ground connections?
Thank you for your time,
Matt
#5
03-05-2019, 12:08 PM
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Join Date: Oct 2003
Location: Cheyenne, Wyoming
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The 2 speeds are accomplished by using different windings inside the motor. The orange and red wires are high and low power. I think the red is high but i don't remember for sure. there should also be a short black ground wire coming from the motor. The ground wire attaches to a sheet metal screw just outside of the blower housing.
#6
03-06-2019, 12:47 AM
Post Fiend
The 2 speeds are accomplished by using different windings inside the motor. The orange and red wires are high and low power. I think the red is high but i don't remember for sure. there should also be a short black ground wire coming from the motor. The ground wire attaches to a sheet metal screw just outside of the blower housing.
There are the 2 normal motor brushes set at 180° at the 6 o'clock and 12 o'clock position, a positive and a ground when they are powered you get high speed. there is also a third brush set at about 2 o'clock when the positive brush at 12 o'clock is de-powered and the 2 o clock one is powered the motors magnetic field is moved out of phase and it rotates slower.
See below pic of a brush plate from a 2 speed brushed motor with the 3 brush set up..
#7
03-06-2019, 07:00 PM
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