OVP in a 201

[opossum]

sounds like a rap song.

Hey all,
I have (had) a dead battery, no tach or outside temp gauge. Me thinks it's the OVP from what I've learned doing some searches. I can't tell which thing it is and where the fuses for it are..It is behind the cover behind the battery right??. Here's some added info. The voltage regulator is near new. I cleaned the terminals, charged the battery and it starts fine now but still no tach or temp gauge. To get it home last night we jumped it and I just kept the rpms up and I got home fine but the instrument lights were dim so I kept the headlights off. I'm not sure if it is charging or not..I suspect not. It does sound a little funny in the area near the powersteering pump but I cant tell what it is..This is the opposite side of the block from the alternator btw.

any ideas?
thanks, opossum