I have a 1996 Sunbird Neptune that did not come with a volt guage. I just got one on Ebay and was wondering if anyone could tell me how to hook it up. It has a terminal marked S, a terminal marked I, a terminal marked G, and an unmarked terminal. Looking at how the terminals are comfigured I'll assume the G is ground and the unmarked terminal is hot for the light bulb. I would then assume the I is an ignition feed? And i would them assume the S is a stator feed? What do I need to test to find these leads? Would I find this all in the ignition switch? <br />Any help would greatly be appreciated.