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So the military decided to ad this upgrade to vehicles due to lost smart boxes and other delicate electronics?

As for knowing if anything else has been damaged. To that, I do not know as I have not attempted to start again until I found out what this did and had it replaced. I have fingers crossed I didn't take out my smart box.

I know that several members already replied with the technicals and specs for this diode and it's use. I will say my finding out about it's purpose was started on a forum about (AN/MRC-145A ) Comm trucks and they were explaining that this reduced "noise" which I'm assuming means electrical...

After much searching, this is a 12v Diode Semiconductor device. It started it's life as NSN 5961-01-180-5634, was renumbered a bit later to NSN 5961-01-593-3791. I'll continue searching SS to see if any of this info has already been discovered and posted. Until then, I found a site in germany...

Howdy all. I'm new to the fascinating world of electrical fires on HMMWVs so please hold the chuckling to a minimum. I was running jumper cables to my M1123 6.5 non turbo batteries trying to get it started. After the WAIT light went out, I flipped the switch to START and nothing but a buzzing...