Mep-831a won’t crank

[Lettja]

So this set was fine when I went on leave and the people preparing for a mission tried to test if it sent power and it did and they said when they turned it off it would turn back on

I tried troubleshooting from the TM by testing the battery from tp30 to tp31 and it doesn’t even get a volt of 20 to 32 VDC so I swapped the battery with a brand new one and it’s the same issue

I tried to figure out the schematics and it makes me think it’s the starter but it’s been over 4 years since I learned to read them and am not sure

 

[Subjock]

Hello,
It's been a few months, so you probably have figured it out by now. JIC, take a look in the TM section for : Mep831 training.pdf (has the starting ckt highlighted) and the ARMY TM 9-6115-639-13&P (readable schematic)
There is another thread in here that gives all the points to trace the 25v from the battery, through the control panel and to the starter. Be patient, you could have a bad connection anywhere in the path, but you can find the trouble if you go step by step.

Good luck!