[greg64]

Greg, the 12.6V is good, that's what a fully charged battery should read.

The brown wire will make it back to an ignition on point, not the ammeter. If you're worried about it, pull the plug at the alternator, then turn the key to on (the engine doesn't have to be running). Then probe with your voltmeter between the brown wire at the alt and ground. It should read 12V.