70deuce

Gary, better yet is a block heater. That really helps these big motors fire up quick.

Phil

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US Navy 1976-1996
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1972 M818 "Optimus Prime"
38' M971 van trailer
1970 M35A2 "Snake Eyes"
1951 M37
M105A2 trailer
M101 trailer

CMSGT

Question: I know the plug fot the heater is 12VDC, what is the actual voltage that you can read on the top of the plug when its operating? I only get 10 VDC. At first I was only getting 4VDC until I went through the circuit and cleaned all the connections, also my dash light was barely lit and the battery that the plug was connected to would drain pretty fast compared to the others when cranking (they are all only a few months old). After I cleaned all the connections the light was bright and everything appeared to work correctly, but the battery drain and the 10 VDC instead of 12 concerns me as something else may be grounded in that circuit. Any info is appreciated.

jwaller

dunno, but if you are getting 10 and the other end of the same lead is 12 then it's going somewhere. what are you seeing from the back of the switch. I'd just look at every place from the battery to the plug and see where it's disappearing.

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CMSGT

I cant find a wiring diagram with each lead on it but at the switch I have 12 until I turn it on then its all 10 so I just wasnt sure if the plug would drop it 2vdc or not.

jwaller

I imagine it could. you are turning on a serious resistor to create that amount of heat.

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M998 W/W
XM818 W/W
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M270A1

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area52

I thought I read in one of the TM's that the resistor was 6V? so it drops it from 12V to 6V.

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