Do the + / - indications on the wiring diagram respond to charge/discharge on the ammeter? The diagram looks kinda backwards to me, but I don’t have the truck in front of me to compare. Sorry, I don't know. My truck no longer has an ammeter.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
| 
