Really hard to tell what you are talking about. What part is turning green/yellow etc? the voltmeter?
And the voltmeter also has a digital readout of the actual voltage?
You sure you didn't tap into the heated grips connector after the controller? (between the controller and the grips?) if so you are measurign the voltage going to the grips which may either change with the controller setting (using a different resistance) or change the duty cycle (a digital controller). Either way will screw up the voltmeter reading.
You should have your voltmeter connected into the heated grips circuit before the grips or the controller.
Yeah, the voltmeter just has LED lights, and a scale on the bottom. Green, yellow, and red. When I put the grips on past halfway, the red light blinks that I'm not charging at all. It doesn't have a digital readout, I put a radio shack voltmeter on the terminals and found that I have just over 14v at idle, about 13.5 when I put the grips on full blast. I've also found that when I apply the brake, the LED goes into the yellow, so something must be messed up.
Behind the radiator, I found the controller connected to three wires, with those connectors your just push together (clear rubber). I also followed each grip to its own plastic connector with two wires going into each coming from the bike. I chose the one on the starboard side and using a Posi-Tap connector and spliced into the switched hot wire. (orange). I did this on the grip side of the grip heater connection, figuring if I messed something up, that would be easier to fix than something coming out of the bike harness. I then took the black wire from the voltmeter and took it directly to the negative terminal of the battery.
I hope that makes more sense, and thank you for the help.