The Stovebolt Site Forums The Shop Area The Electrical Bay Heater motor

Can anyone tell me if a Delco heater motor 47536 is 6v or 12v? My 47 3600 had everything 12 volts when I bought it, but I'm not sure about the heater motor. I'm restoring it back to what it was before, with the 59 235 and 4 speed trany. So far, I rebuilt the Engine, Trany, Brakes, Gauges, all Glass, Body work, Seat, all in the last year. I would be farther along but I'm waiting for painting to be done. As I'm reassembling, I want to know if my heater motor is 6 or 12v. It does run on 12v, I jumped it to a battery.

Partial part number? 5047536? GM parts wiki shows this:
http://www.gmpartswiki.com/getpage?pageid=68358


1950 would be 6 volts. My 6 volt heater motor ran like a banshee on 12 volts, so I installed a 12 to 6 volt reducer to slow it down to an acceptable noise level.

Sorry but I don't have any information about that particular part number. I can tell you 475351 was a 6v. But that number doesn't come up in anything I have. 475351 was used from the late 30s to late 40s I believe. Please take a look and see if there are any other numbers...maybe a longer string that begins with a 504.....

Looking at the wire going into the motor it is cloth type I would think it is 6 volt

That is the only numbers on it what you see in the picture.
Delco Appliance 47536
Some town in NY. USA

I should just not trust it and get a new 12v motor

There are some 12v motors on the big internet auction place. The only 12v replacement fan motor made in the USA that I know of is sold by Old Air Products in Fort Worth: https://www.oldairproducts.com/product/blower-motor-12-volt-20-3615

I agree a little with Kevin but they could have replaced it and used the 6V wiring. If that cloth wire is integral to the motor, it's 6V.
I would think a 6V run on 12V would almost be a hovercraft.
You can test it for 20 minutes using a 7A-10A fuse. Probably should have the squirrel cage on it to create a little load. The speed and the amp draw may give a clue. None of the above is totally definitive. Otherwise, as you said, get a 12V motor.. Which of course, is not all that easy sometimes. Hard to search internet "replacement 12V fan motor for a 47 Chevy truck." Except possibly in Stovebolt Search

You CAN find one by diameter and length of housing....... diameter, length and shape of shaft...... Give us that info and a couple good pics of the motor if you want, and we will find. You probably should replace it during a refurbish anyway. PITA to get to again.

There are methods to electrically and physically determine, but beyond most folks capability and not 100%.

Thanks, I ordered a new 12v motor. I don't want to do it again.

I am not sure what your 12v motor cost. I did a lot of research when I rebuilt my heater and converted to 12v. I found a replacement at AutoZone. Part #35512. Everco. Heater blower motor. Current $38. It is variable speed. bolted right in, and is reversible. The only modification was I shortened the shaft (cut it off). I re-used the existing blower fan.

Everco blower motor

What switch did you use for this motor. Standard for your '54, or something else???

lumbersawyer If your heater motor is 6 v and it looks like it is,it will scream on 12 volt. You can use NAPA voltage reducers to tame it,mine has run a long time that way. Just follow their directions. Using the original 2- speed swich always run it on hi speed.

I used the original 2 speed switch. It doesn't care 6v or 12v.

Thanks Dave!

dgrinnin That's it works good,fired up and sat out in the sun today,big snow tonight so will stay in might go pack the snow on my road,no salt there.