I just bought a 2008 Chaparral 180 SSI. The voltage gauge on the dash shows no voltage. The gauge lighting is working though. I have 3 wires, Purple (switched power), Blue (gauge lights), and yellow (ground). With the key on I have 12 volts at the purple wire, 8 volts on the blue wire (lights work fine), and the ground wire is good. I bought a new gauge because I figured if I have voltage it must be the gauge but the new gauge does the same thing. Is there anything else I can check on this system? I figured it would be an easy fix but doesn’t seem that way now.