volt meter

After several weeks of reading accurately, the dash voltmeter is reading double the correct voltage. Cycled power on and off and no reset. Any suggestions to fix.

I'm making a new thread again this year to keep up with some changes. Here is last years thread with some good pics and info Multi - Custom Switch Panels (2017 thread) I am still making custom switch panels for all year and size Pioneers. The shop has changed my ordering requirements some...