80 maxim speedometer wiring diagram?

im sure one of you on here knows... i just bought an aftermarket speedometer from mikesxs and its got the wiring diagram for it, but on the stock setup on the xj, theres a black and blue wire for the backlight bulb, and then theres a green/white wire that goes into the center of the speedometer. anyone got a clue what that goes to? Im just wondering if i can bypass it, or if i have to splice it in with another wire..... not sure if its just another light or what. thanks in advance

 

Sure; it goes to the reedswitch for the self-cancelling unit.

There'a a reedswitch inside the stock speedo that provides a signal to the self-canceller to let it know the bike is in motion, it "pulses" with the rotation of the magnetic drum in the speedo. Just insulate the end of the lead wire and tuck it out of the way.

You're going to lose the self-cancelling feature; doubtful your aftermarket unit includes this part.

 

it doesnt include it. i made a new wiring harness, so just insulate the wire on the other end? hoping all will work out well. speedometers pretty sweet

 

oh, and thank you by the way!!

 

so i put in my speedo, my new one now registers like 77 miles, but my trip meter went up to 790... lol... any ideas why? maybe bouncing too much?