Many moons ago I installed a Auto Meter Mini gauge trio. Temp, oil pressure, voltmeter. Rather spiffy install if I do say so myself. Anyway, I noticed sub par charging. In the 12'* at idle and maybe 13.5 at speed. Strange thing was, I would get 14v when it was cold. I suspected the alternator was crapping out. With a 2k road trip looming, I needed to fix it. So, Saturday I warm everything up and load the alternator down so I could take it to Advance and get a warranty replacement. (Needed to be not working to get a replacement.) AC, wipers, blower, headlights on showed a dismal 12.3 at idle, maybe 12.9-13 at high rpm, measured at the battery. Ok, alternator is crapping out. Just for kicks I measured at the alternator, 14.7-14.8 at idle. WTF? My battery cables were clean and tight but they were 20 years old! I quickly fabricated a 8g. wire and piggy backed it along the OEM cable off the alternator to the battery. Boom, 13.7-14 at idle with load. 14+ at higher RPM. Moral to the story, just cause the cables look good and are clean doesn't mean that they are any good. I will be replacing all three this weekend with new ones. Could be why my starter drags *** when it get hot.