Originally Posted by pelago
You’ve got several of us looking for extra wire #15’s for you.
Here is a sketch I took from TM9-8014 which covers the M38A1 and the M-170 ambulance. Now, it’s an Air Force manual and there is evidence that all M38A1’s were not the same depending on the contracting service.
But – it looks like wire #15 is a “hot” line to the light switch, which is a junction for everything. # 15 is a branch from #10 through what looks like a 2 0r 3 wire Douglas connector. #11 off the same connector looks like “hot” to the ignition switch and # 25 is a “hot” to the horn.
If your wire turns out to be a second # 15, I’d just treat it as spare “hot” battery connection – tape it up and use it if you need another 24-volt source sometime.
