microbe,
Don't spend any energy trying to measure current output on your alternator, it's not relevant to its health.
The most you should see in your system for voltage when it is charging is 14.7 volts...this is pretty high, but it's considered OK by auto electric shops. This is pretty close to your 15 volts, and with a inexpensive meter, maybe this is what you are actually reading/getting.
After reading your later posts, it almost sounds like everything is high, but OK. Again, don't be concerned with 'amps'...this is a function of the connected load.
My only question would be, where is your alternator BATT wire connected, and is it a clean connection that can see the battery and all accessories well. This single wire is the only feedback the regulator has to monitor things.
I'm curious, what device did you use to measure your 20 amp 'start' load with??
Stuart
