Need I.D. on this underhood plug 1994 E150

[yippee]

I was tinkering under the hood on my van today, it's a 1994 E150 with a 5.0. I noticed this plug had a wire that was broken. I'm not sure if a rodent got to it or if it's age related, but either way I'd like to figure out what it goes to in order to try to order a replacement pigtail. It has two wires, one is red/green and the other is green/red.

Thank you.