13-10-16, 08:44 AM
You can. You should be able to measure between each of the wires coming from the alternator (with it disconnected although it shouldn't matter if it is connected). So that's 3 AC voltage measurements. They should all read the same (to within a couple of volts). How you test the current output is a little more tricky unless you have some high powered resistors available. What I would do is to (with the alternator connected) put the lights on and then check the 3 AC voltage readings. Again they should all be the same. If one is significantly lower then that alternator coil is suspect.
The regulator should give a maximum output voltage of some 14.4 volts DC (I'm not fully conversant with these on bikes so I'm winging it a bit here). I would also switch the voltmeter to AC and see what ripple there is. I wouldn't expect there to be more than a couple of volts ripple when connected to the battery with the motor running at at least 2-3000 rpm. Switch the lights on and off and see what that does to the voltage. It shouldn't fall very much.
The regulator should give a maximum output voltage of some 14.4 volts DC (I'm not fully conversant with these on bikes so I'm winging it a bit here). I would also switch the voltmeter to AC and see what ripple there is. I wouldn't expect there to be more than a couple of volts ripple when connected to the battery with the motor running at at least 2-3000 rpm. Switch the lights on and off and see what that does to the voltage. It shouldn't fall very much.
Malc
Old enough to know better.
Old enough to know better.