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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?
The dropping resistor is in the heater box itself. As an aside make sure the box is clear of leaves, pine cones or needles & old mouse nest and debris. A fire can result, the resistor wire gets red hot in operation. Jus' sayin'.
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?
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.
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.
It is is not different wingdings but an extra brush.
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..
Ok. That makes sense. So I will run this motor knowing I only have Hi or Low speed, depending how I wire it. Thank you All for your responses and your knowledge.
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