It's alnost easier to open it up and repair the connection to the resistor wire which is most likely the culprit. Ive repaired mine but that was quite some time ago but someone (Hoss) might chime in with a link to the repair procedure.
87 vn750at least that is what the frame #'s say
"Squirrel Bike" aka Jersey
Rat bike with a good PR agent
shaved and coastered
2 into 1 exhaust
rear 170 and front 110
custom dash with voltmeter
Recovered seat without "butt hammers"
More to come
Praise to the Parts Goddess Crobins for needed things
When someone tells me "Great minds think alike" all I can think is "You Pervert"