I am having a couple electrical issues.
1) I am getting a high voltage to my guages
2) My tach stopped working
I have a couple of questions. Could grounding 2 batteries to the same post on the engine block cause problems?
Is the grey wire in the photo the tach wire and if it is will it read 0 amps if the sensor is bad?
Which wires do I test from the alternator/regulator to troubleshoot the high voltage issue? The photo is not great, but it shows how the regulator is mounted externally to the alternator.
Any help would be appreciated.