ok first off the truck is a 1946 chev pickup/have done a voltage test when truck is running it shows almost 6. When the battery is fulled charged, it is reading around 7. This is my 4th battery is just over 3 years. The guage is only showing one line above center, unless the guage is not reading correctly, which it is the original.But I think it reading because when it stops charging, it goes to the discharge side. Been looking for a wiring diagram for the instrument panel, to see if something in the dash in not hooked up wright or maybe backwards, any suggestions would be greatly appreciated, and I will check the horn circuts
