How to Repair a Couple of Wiring Harness Problems

Start by reading this article. These have been known problems for years and in fact Ma herself knew it, because the optional 60A alternators had what is known as "fleet wiring."

http://www.madelectrical.com/electricaltech/amp-gauges.shtml

Your 3 terminal connector I believe is for the dimmer switch. Start by reading this:

http://www.madelectrical.com/electricaltech/brighter-headlights.shtml

and looking for "Crackedback" on here, who has come up with a great little headlight relay kit

Also, you can get the replacement terminals for the connectors at NAPA. I can never remember what they are called