939 Protective Control Box source

[Crash_AF]

I did some NSN searching on Google and came up with a good supplier hit for the 939 control box, I purchased one for my 936A2 wrecker and it works flawlessly so far... I can't test the voltage regulator yet since I haven't gotten it started.

Southern Automotive Wholesalers Inc
http://www.southernautomotive.com
248-335-5555

I talked to Tom Tyson (tom@southernautomotive.com) and ordered the box from them (NSN: 6110-01-444-2546) brand new for $149.55 plus shipping.

They also make most of the rotary switches for that truck as well.

The only thing I noticed about the box is that it's completely sealed, no pipe plug like the older ones. Other than that, it hooked right up and for the first time since I bought it, the battery and run switches do something...

Later,
Joe

 

[steelsoldiers]

Fantastic. Good sleuthing Joe. Thanks a bunch. I think I will buy one for a spare for my 925A2.

 

[54reo]

will it work on the old M809 series?

 

[cranetruck]

Mark, how are they different? According to the wiring diagram, the pinout is the same for both, except "E" on the 939 series first goes through a Neutral Safety switch before it gets to the ignition switch (wire number 499-498 instead of #14 for the m809 series. ..

Joe, how is the connector sealed, rubber gasket?

 

[BKubu]

I don't know the truth of this...but this is what John Winslow told me. The control box on an M939A2 will work on an M809, but not the reverse. I never tried it so I am not sure. This is definitely what I heard from John.

 

[Crash_AF]

I will have to look again as I didn't look that closely into it, but I believe you are correct, it's a standard cannon plug with a rubber gasket between the body and plug shell.

Later,
Joe

 

[MotorTMan]

Gentlemen,

The 939 series box will indeed work on an 809 series. I can tell you from experience. I bought one a fewyears ago for my M813 and it works flawlessly. Just plug it right up. As said before, a 809 series box will NOT work for a 939 series.


Russ

 

[cranetruck]

Anybody got a junked one? Need a mate for the connector pictured below.
Chris, do you still have your old one?
Thanks.

 

[twisted60]

I just sent an email to Southernautomotive asking about the control box, I'll post the answer when I get it, as this tread is from '09 it's time to add some new info.

 

[LotharTX]

@Twisted60, I'm guessing you never received a response...

I purchased one last year through Erik's Military Surplus and it recently shorted out, but considering that's what was wrong with the one last year I think its my truck and not the box. The control box had www.southernautomotive.com on its sticker. I tried contacting them from their website information and never received a response either, but I called them and was told to order it from their ebay store. They are listed on ebay as Southern Automotive Wholesalers and the control boxes are listed for $275 plus $12 shipping. I also checked Erik's website and he currently has them in stock for $250 plus shipping.

hope this helps