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It's original to the truck. Truck only has 1500 miles on it. When I hit the lamp test switch only a few indicator lamps light. I'm assuming they should all light. Like I said, the PTO indicator lights now, but it doesn't with the test switch. Same with the fan switch. Doesn't test, but comes...

I've got the winch working just by removing the PTO relay and jumping pin 30 to pin 87. Basically bypassing all the transmission and rpm sensor stuff. Yes, it's looking for neutral and rpm between about 1200 and 1500. The winch switch gets power from the PTO switch and then sends it to the winch...

Well having the right diagram would certainly help! I got mine off the Midwest Military Equipment website and it was the only one on there, didn't occur to me that there could be others! Thanks for the info! Hopefully I can find the problem.

Trying to get the PTO winch going on my new to me 1998 M1078. Everything on the truck works except the PTO winch. I was able to hot wire the PTO by jumping pin 30 to pin 87 on the K37 PTO relay socket and the instrument light came on and the PTO was engaged and running. Following the wiring...

Awesome, thank you for the video and pictures. My truck came yesterday and I swapped out the 4 military batteries and put 2 group 31 batteries in. Started right up. Just ordered a battery disconnect switch 👍