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for some that is their desire. For myself.... quick super cold engine start is not my desire at all...... am using this as a poor mans Eberspacher/Wabesco. Heating engine for starting and for heating habitat as one would with the Eberspacher/Wabesco. Will plumb same way.... just over all cost...

angles....... curious... what angle does these NOT work well or at all.... aka if your parked up hill? or god forbid you plopped the truck on it's side and need to camp out and wait for help???

hmmm... the M939 been referencing a lot only truck seems to be in there and not kits. Will look again. Thanks.

What TM section is Special Kits wiring schematics usually found? The truck schematics are in x4 (AKA 24 or 34) but have yet find the special kit diagrams like you posted. Thanks for any insight.

Some Pump(s) reference info for those following this. Granted this info is not Deuce... but from a M939A2 but then again this would be the most modern setup in general? coolant Pump NSN 4320-00-930-2045 Cagec 19207 P/N 10946835 Coolant Pump Datasheet Prime Mover Quantity: 1 Intake...

Not sure when coolant pump gets activated. (hi only, low not at al, or both but with a resister slowing it down in low setting? ) Would be interesting to find out. As noted above though... at least on the 939J24.... HI is NOT locked out at start up. Apparently it starts in high

The wiring harness for one version of the electrical connections (The M939A2 Truck) that runs from Control Box to 939J24 coolant heater is: P/N# 12256438 NSN# 6150-01-096-5053 This is potentially one of the last trucks that used that model Heater so it should be most modern type wires...

PMed about email response.

More digging. Found out my SW was used in the M939 and had a high and low setting. BUT....... there may be a good reason there is NOT such a feature on some of the Control boxes in other MV's.. The heater (at least the SW Model 939J24 ) will automatically switch back and forth between High...

The SouthWind/ Stewart Warner COOLANT heater I got does show on its data plate two Btu ranges. So maybe on mine at least the High/low switch may make a difference???? Have not yet looked close but in the schematic above of the "dual all in one control box" (also used in CUCV?) is it possible...

M901 is only vehicle I saw listed in this info.. but not sure what am looking at. From image of item Part # 10885798 G-701633 Rev. N (SW= Stewart Warner ???) search with part # found NSN 2590-00-953-0110

This appears to be for the combo control box (Coolant and Space Heater)

which one uses a wick on the south wind models? The Coolant heater? The Air heater? or both? Mine is a 939J24 year 1986 PS- looking for a controller and cables UPDATE- just found and ordered control box with a short cable on FleaBay (original application Gama Goat) for too much $$$, but...