Looking for some cab heat in my 818 and had a friend give me a heater that came out of a M37. Looks real nice. The NSN 2540-00-869-0424 if any one wants to look it up. I cant find in the TM's where the heater gets it power from. The heater motor on this unit has a standard military single wire plug. Will this plug into the wiring harness under the dash. I know that i will need to get a switch to put in line with the the wire so it wont be running all the time. Also there is a heat sink that i will need to get so the extra voltage and energy waste will have a place to go when and if i wire it up for use in High and low mode. I will try to post some picture not sure if they will work most are to big for this website.
That unit should work fine in your truck. You will need a resistor to make a low speed connection. You might have to piece together some parts to make the system work, but parts are available.
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Right above the steering column on the firewall, there is a circuit breaker. I installed a splitter there, and pulled the power for my heater from the splitter. I might have a photo at home of what I did. I think I even have a parts list and "blueprints".
__________________
Jonathan
Secretary/Newsletter Editor, M.V.C.C. Denver, Colorado www.mvcconline.org
M.V.P.A. #32113
U.S. ARMY 01/74-12/79
Proud Member of the Patriot Guard Riders
A Veteran - Whether Active Duty, Retired, National Guard or Reserve - is someone who, at one point in their life, wrote a check made payable to "The United States of America", for an amount of "up to and including my life". That is honor, and there are way too many people in this country who no longer understand that."
Before you get too far ahead of yourself, did you check the heater core for leaks? Just a thought. When I wired my heater in, I tried to make it look like the motorpool did the job. I bought my wire and wire connectors from Erik's Military and Industrial Surplus - Military Vehicle Parts, Industrial and Military Surplus Electronics You may or may not wish to be as anal as I am when it comes to truck wiring, I just enjoy using the Mil-Spec parts and pieces. I hope this helps give you a start on you heater wiring, if you need any other photos or explainations, just let me know.
__________________
Jonathan
Secretary/Newsletter Editor, M.V.C.C. Denver, Colorado www.mvcconline.org
M.V.P.A. #32113
U.S. ARMY 01/74-12/79
Proud Member of the Patriot Guard Riders
A Veteran - Whether Active Duty, Retired, National Guard or Reserve - is someone who, at one point in their life, wrote a check made payable to "The United States of America", for an amount of "up to and including my life". That is honor, and there are way too many people in this country who no longer understand that."
The Following User Says Thank You to steelandcanvas For This Useful Post:
Not 100% sure but since the 818 has the same cab as the m35, I figure you should have a wire that can be used for power already. Mine had it. Anyway just above where the heater switch would be put(see the 3rd pic above) you should have a wire that isn't plugged into anything. That wire is only hot when the main switch is on and would plug right into the switch box(or if you use a normal on/off switch you could just plug it into that then run another wire out to the heater itself. I hope this helps.
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1971 M35A2 w/w
2007 VSE M105A2
I know that you believe you understand what you think I said, but I am not sure you realize that what you heard is not what I meant!!
Cab Heater question
