The Stovebolt Site Forums The Shop Area The Electrical Bay Heater switch and motor wiring

I'm now at point where I've bolted in the heater and got my hoses all connected. Next is hooking up the electrical. I see there are 2 wires that come off the heater motor and I found the heater knob in one of the many boxes that came with my truck. It has two leads so I assume one is for hot and the other to the heater. Is the extra one from the heater just a ground? Couldn't find anything about the heater switch wiring in my diagram. Also I've converted to 12v so I'm assuming a voltage reducer in line as well. Should it go before the switch or between the switch and heater motor? Any light on the subject would be greatly appreciated.

One wire is a ground

heres a pic if you have a harrison it may help

You didnt say what year truck or heater type.

I used a 12v motor, so cant answer where to install the drop.

Is it the original switch?

Good Luck

Yes that's the motor and I'm sure its the original switch. By the way it's a '50 Chevy half ton. Sorry I forgot to mention that. Thanks for the help.

Your lucky to have the original switch. I had to use an aftermarket switch. its kinda flimsy, but It did give me 3 speeds.


Hopefully someone will chime in a suggest the best place to put the drop. And a fuse if needed.

Good luck

Thanks again

My heater has only one wire. My heater is grounded by bolting it to the firewall.

Thanks 53 panel. I think I'll just ground the wire with a screw to the firewall.

The original motors are all one wire, upgraded motors or 12-volt conversions are usually two. Just ground it to the firewall.

The original ad heater motors have two wire coming out of the motor.One wire is grounded to the unit like the picture dads50 provided.I would put the reducer after the switch close to the heater.Make sure you put that voltage reducer in a place where nothing will touch it.The reducer will get extremely hot and can cause a fire.Mount it to a metal surface,it will act as a heat sink.I would even put a inline fuse in the system.

Tim

The two-wire motors I've seen also have a direction of rotation. You can use either wire for hot or ground and they will spin in opposite directions (for obvious DC reasons). Not sure if that matters in your case, but just thought I'd mention it. You don't want the heater sucking cold air in through the little vents and blowing hot out the intake.

The original 6volt motors will spin the same direction regardless. The new reproduction Chinese 12 volt motors will spin two different ways depending on which wire is hooked to positive.I don't know about the reproduction 6volt motors.

Tim