G'day & Welcome!
Are you getting around 14 volts from the alternator with the engine running?
I'm wondering if the alternator is starting to break down at high revs - maybe get someone to rev it while you take a reading?
Did you check the condition of the terminals for corrosion and / or that connections were tight?
Are you getting around 14 volts from the alternator with the engine running?
I'm wondering if the alternator is starting to break down at high revs - maybe get someone to rev it while you take a reading?