Alexmck, I believe that has already been suggested by Jim Sears. As he stated, just move all wires to one post. No extra wire needed.
Ammeters are rugged. What if anything, but the gods, caused this problem? Is your ride modified like conversion to 12 volts?

Last edited by beltfed; 05/17/2016 1:37 PM.

Six volt guy living in a twelve volt world