doing some tests and with the key on i have 11.87 volts at both field wires the output should be considerably lower on one or am i wrong .
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yesJim Jim Jim...
Need a lot of background info
- Isolated field alternator?
- Electronic voltage regulator?
- How are you measuring the voltage. ( From what point to what point)
engine not running key onEngine running or not
i was gonna do that but with 11.87 volts on both field wires with the key on and engine not running made me think it may not be a good ideaRemove green field wire at alternator. Take jumper and ground that alternator field terminal. Start and see if it charges. if not, leave jumper in place, key in "run" and chek voltage at blue wire field terminal, all wiring in place
If you have that voltage and it will not charge, rerun test and with engine running fast, check voltage at alternator output terminal. If it is still low, 12v or less, it is not charging. If it is quite high, way over 14, and not charging, you have a break in the charging line to battery
i was thinking something like that . i worked normal last fall when i put it away but yesterday when i took her out it wasn't charging .Hmm Diode short/grounding ?
Remove green field wire at alternator. Take jumper and ground that alternator field terminal. Start and see if it charges. if not, leave jumper in place, key in "run" and chek voltage at blue wire field terminal, all wiring in place
If you have that voltage and it will not charge, rerun test and with engine running fast, check voltage at alternator output terminal. If it is still low, 12v or less, it is not charging. If it is quite high, way over 14, and not charging, you have a break in the charging line to battery
Other:
VR controls "the amount of ground" of the field via the green wire. Check wiring for function, and make absolutely certain VR is grounded.
So Vr gets switched 12V from key, as does the blue at the alternator field. The VR controls the grounding on the green thus conpleting the field and controlling it.
If it doesn't go full charge when you full field the alternator , then yeah it's toast.
If it does full charge then your regulator is bad or not grounded properly. Like he said
VR MUST be grounded.
yes .Is the regulator properly grounded,