washer reservoir (1 Viewer)

[ed m]

recently got the cruiser corps windshield washer reservoir kit.
the wiring harness has a 2 prong connection while the truck has 3 wires, any idea which 2 to use and what to do with the 3rd wire, the wiring schematic only shows 2 wires on the truck side?

 

[hobbes]

I cannot answer your question, but those who can might need the year of your truck.

 

[ed m]

72 year, i'm assuming from the looks of it the washer was original