I bought a 1947 RC60 last fall, and the wiring was all jerry rigged. It had 12V battery, and was negative ground. I bought new cloth wire harness and light switch w/resisitor from Korves. I bought new 6V battery, all new cables, and new starter switch. Also had starter and generator and regulator gone through professionally. I put it back to positive ground and had regulator set for that polarity by the rebuild shop. Tonight I put it all together, and fired her up. Ran good but showed negative charge on dash gage. If I pull light switch out to the middle charge position, the ammeter needle burys negative, like it is dead short. When I turned ignition switch off, the gage was stiil showing discharge till I finally unhooked positive battery terminal from post. The resistor on light switch is super hot. Can the voltage be shorting thru the new light switch, where it mounts dash? No wiring felt hot to touch. Any ideas? I followed wire install diagram carefully.