Very odd switch in an M38

Post by **wesk** » Sat Jul 02, 2011 1:00 am

This switch is in an m38 that is owned by a member in Nepal. Can anyone tell me what system it supported?

Jim · Post by **Jim** » Sat Jul 02, 2011 7:22 am

Perhaps something out of an aircraft? Maybe
to run a non-issue radio set?I wouldn't think a
jeep would require methanol injection.

Jim in Darkest Arkansas

Balvar24 · Post by **Balvar24** » Sat Jul 02, 2011 7:53 am

What was the 20 Amp breaker for? My guess is that the overided bypassed the circuit breaker. Unless you're talking about the cigarette lighter. It's used to light cigarettes.

Post by **wesk** » Sat Jul 02, 2011 9:09 am

That is the question I asked. The plug, the red guarded switch and the box hanging under the instrument cluster were there before he bough the jeep. Does anyone know what system added to an M38A1 would have used those three components.

Balvar24 · Post by **Balvar24** » Sat Jul 02, 2011 12:20 pm

http://www.g503.com/forums/viewtopic.php?f=36&t=69503

Does any of this help?

Balvar24 · Post by **Balvar24** » Sat Jul 02, 2011 12:25 pm

http://www.tpub.com/content/misc_manual ... 4P0007.htm

MX-777 Electrical Transient Suppressor

Not sure what it does, keeps starter/generator from frying radio?

Post by **wesk** » Sat Jul 02, 2011 4:07 pm

Balvar,

That's it exactly. Thanks a lot.

swordmd · Post by **swordmd** » Sat Jul 02, 2011 10:47 pm

The box is a suppressor electrical Transient MX-7777 B/GRC it was used on mostly tracked Vec's with 100 amp and 200 amp systems like the M113 and M577 time line 60s-90s Most of the time with VRC 12 radios I have also seen them with the AN/GRC 106 radios.

swordmd · Post by **swordmd** » Sat Jul 02, 2011 10:51 pm

What is the late ww2 light switch used for? It has a face plate I have not seen before.

Post by **wesk** » Sun Jul 03, 2011 8:36 am

Looks like it is being used as a 5 position selector switch. 4-3-OFF-1-2