Earl, The pins are marked A, B &C. The A, B and C don't stand for anything, they are just sequential characters, same as 1, 2, 3. Your electric T&B should have a sticker or marking on it telling you which pin is power and which is ground. A typical T&B just uses one pin for power, and one for ground. The third pin is typically not used. If the gyro isn't marked, you should be able to give the Part Number or Model Number to an instrument shop and they should be able to tell you which pin is which. Best Regards,
Wayne DelRossi Alon N5618F Hours logged since restoration: 363.8 "Nobody has ever scientifically proven that life is supposed to be serious." **************Ideas to please picky eaters. Watch video on AOL Living. (http://living.aol.com/video/how-to-please-your-picky-eater/rachel-campos-duffy/ 2050827?NCID=aolcmp00300000002598)
