Electrical Help Please

Mike69cuda said

The only thing that the wrench test indicates is that there is current flowing in the field winding. This tells you nothing about the output side of the alternator, since there is no transformer action when it is not spinning.

Not trying to be combative, just think it tells very little about the health of the charging system.

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With no magnetism, it indicates the field circuit is faulty. Could be reg.

If it had magnetism, then the reg is working, and the issue is at the alternator

The test was never meant to test output, but to quickly determine which item to buy on the way home, after you had to get a jump start at the supermarket, - as I mentioned in the original post. lol
Or for me to diagnose at reception, which bay it's going in, and who is to work on it

Not always, but experience has proved it reliable.