Hook up the ammeter with separate test wires, bypassing ALL stock wires and see if it works or not. Ammeters are fire starters, even with a shunt. Too many amps. Put in a voltmeter instead. Then you can read the 14.5 Volts from inside the truck. Some Voltmeters need to be calibrated to a good remote voltmeter by turning calibration screw or bending needle. Your charging system is charging properly as I already said.


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn