Voltage reg is on the alternator. Search here how to unlock obc. Then find the voltage readout in obc. You can also buy a cig lighter item that displays voltage.

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LCD Cigarette Lighter Voltage Volt Digital Panel Meter Monitor Car Truck 12V/24V | eBay

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2006 4.8is, Black on White. SOLD Sniff Sniff.

2017 F85 x5m, Black on Red. BEAST MODE


"The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain

Unlock OBC post 5