Soundguy
Old Timer
- Joined
- Mar 11, 2002
- Messages
- 51,575
- Location
- Central florida
- Tractor
- RK 55HC,ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC
Is your battery completely discharged? If your battery is fully charged, you should read 12+ volts at that alternator (battery volts). If your battery is that dead that you only read 3.47 volts, you should surely charge it or get another battery. The 3.47 vdc is telling me there is something wrong with your wiring or you have a defunct battery. I would disconnect the alternator and read voltage right at the output terminal with nothing attached. Don't let it run too long that way, but that should be a quick check.
a safer way to do that is to provide a load at the alt charge stud, like a lamp bulb.. even a cheap-o turn signal or dome lamp.. or headlamp.. just something for the reg to provide a steady field curent for vs a spike.
I agree.. bat volts should appear at that lug for the charge unless there is a bad wire somewhere.. or the bat is toast..