I'm sure this is possibly an obvious solution, but I wanted to see if anyone had any insight here that I'm not realizing. Both (new) starter batteries read 12.6v with the truck off, truck running, both read 12.6 volt. Engine 2k+ RPM - batteries still reading 12.6v. 0 change in voltage. Wondering what the next logical step is in diagnosing the issue. Obvious thought points to a bad alternator, the truck has very low KMs, so I feel it may be unlikely, but certainly anything is possible and with age.. who knows. Any other ideas? Voltage regulator? Belt/ alt pulley? Should I just pull the alternator and test it? Any guidance appreciated.
Cheers!
Cheers!