the stock rr has a sense lead that does come from the switched side of the harness, (the aftermarket may also use this)this can quickly be tested by turning on and off the key with the battery connected and the meter set to scale appropriate for 12v hooked to the brown wire (i think it was brown) in the rr connector and other lead to ground. wire should show aprox 12v when key is on, 0 when off, you will also find another wire(white or red) that should have 12v all the time, even key off. if you find these, then i suspect trouble with the charge system rather than the other wireing of the bike.
if you rule that out, another quick test is put your meter on ac volts, (scale appropriate for 12-20vac), while the rr is plugged in and bike running, connect one meter lead to ground, the other-probe the three yellow wrires in the back of the rr plug. you are looking for aprox 12vac on all three wires. the exact amount isnt important, what is is that they are all almost identical in voltage. one or more significantly lower than another indicates a problem, potentially a bad stator. no or low (well under 12) voltage on all 3 is also bad.
Last edited by beavis; 03-31-2008 at 12:24 AM.