1940 ford heater motor
 

I have an original heater from a 40 ford I want to use in my 37 pickup. The truck is still 6 volt so I didn't think I would have a problem witht the one I have.

When I went to hook it up I noticed there were 4 wires coming from the motor and they were cloth covered and covering was rotting and exposing the wires. Along with not knowing which wire was what.

I guess I am looking for a sorce to rebuild or replace the motor with a usable one and identifiy the wires to get it wired up properly.

I figured there is probably even a ford Barner that messes with these old heaters.

Thanks

Rudy

Re: 1940 ford heater motor
 

That motor runs forward for heat and backwards for defrost. You will need to open it up and solder in new wires . There is a guy on Ebay that sells the template and instuctions on wireing the motor. Dont know how good it is ,just seen it on there the other day.

Re: 1940 ford heater motor
 

Wow, that interesting about running backwards for defrost. I thought the switch would control the motor speed like on later fan motors. That explains the extra wires.

Thanks.

Re: 1940 ford heater motor
 

The switch does control the speed, hi and low for heat and hi and low for defrost. Off is in the center.

Re: 1940 ford heater motor
 

MAC's has wiring kits for the heater motors. P/N 91A-18457. Page 170 in current '32-'48 catalog. I've used one and it worked out fine. Hope this helps.

Re: 1940 ford heater motor
 

I did look to see what was in the Mac's catalog and I saw they had a universal motor.

Thinking that might work for me as well. The truck in more of a hotrod than a restored truck.

Still can't get over the fact that the thing runs in reverse.

Re: 1940 ford heater motor
 

Napa also sells Balkamp 6 and 12 volt blower motors to fit the old Ford heaters that are two wire, but reversable, so they will operate as original. :)

Re: 1940 ford heater motor
 

Have a look at the back of the switch if it is orignal, there may still be colored dots indicating which wires go where. If your wires have enough cloth on them look closely for colors. Yellow, Red, Brown and Green. If you are running 6v positive to ground the green should go to ground. Match the other colors up.

One additional wire (black should go from the switch to key switch post "key on" to the black spot on the back of the switch. I just got my heater running again, hope this helps.

Re: 1940 ford heater motor
 

These motors have four wires so that the direction of rotation can be controlled with the original switch. To do this the switch reverses the polarity on the wires to the field coils only.

The speed is reduced via the introduction of a resistor in series with the armature circuit only.

Hope this helps come.

Cheers,

Meric.

Re: 1940 ford heater motor
 

Hi

on the reversable motors. 1941 and 42's used electric motors to operate the top irons on convertables the motors were reversable as well as the hot water heater motors. I think the motor for the convertable are somewhat stronger than the heater uses. I hope this helps some.

Big al

Re: 1940 ford heater motor
 

YOu wouldnt happen to have a part number would you?

Thanks for the info.

Re: 1940 ford heater motor
 

Yes, NAPA # 655 1022. This is a two wire motor which will require mods to the stock switch, or the use of a reversable toggle or rotary non-stock switch.

Re: 1940 ford heater motor
 

I have rewired a heater motor that you have. Early Ford for example has the wiring harness for the motor(39-40-$18). I opened up the motor when the wires still had the original coloring. I connected the new wires to the motor and it runs as it suppose too. If you do not already have a wiring diagram, I have one.

Re: 1940 ford heater motor
 

What are the mods you mentioed re the stock 4 wire switch to run the 2 wire NAPPA motor?

Re: 1940 ford heater motor
 

I should have said mods may be required, as I'm not sure the stock switch can run the 2-wire reversible motor. The stock low-speed resistor may also have to be changed with 12 volts. I bought a center-off reversing switch just in case the stock switch cannot be used, but I haven't taken the time to try and use the '40 switch.
FYI, the NAPA 12 volt motor # is 6551022, 6volt # is 6551021.

Re: 1940 ford heater motor
 

If you use the 4 wire motor you must also use the original 4 termial switch. It will not work on a 2 ter. switch. 4 ter. switches are hard to find and pricey. OMO ken ct.

Re: 1940 ford heater motor
 

I am planning on rewiring my 41 heater , I've ordered the harness but when I took the heater off it looks like everything is riveted together. Has anyone done a 41 and if so ,any pointers?

Re: 1940 ford heater motor
 

How did you get the motor apart?
Thanks
Roger

Re: 1940 ford heater motor
 

That's what I'd like to know.

Re: 1940 ford heater motor
 

I'm late to the party, but I have just pulled a 41 heater apart. I haven't dismantled the actual motor yet.

Did you get it sorted? If not I'm happy to share what I did.

Is there anyone that can point me to with a connection diagram? I'm assuming the light in the switch comes on with the fan, yes?