A friend has a 1999 Road Star and the fuel gauge wasn't working on it. We took the sender unit out, measured it's resistance at various float locations and determined that it was on the money! With a full tank of gas, the gauge would still read empty! We even took the sender unit out of a working 2000 Road Star and put it in the 1999 and got the same results. We checked the little green connector under the fuel tank and it seemed fine. We had about concluded that it had to be a problem in the wiring when my friend, the owner of the bike, saw a white connector that was hooked directly to the ground on the battery. He disconnected the connector and the panel went dead. When he reconnected the connector the panel lit back up and lo and behold the fuel gauge was working! Anybody got any ideas as to why this would fix the problem?

We had disconnected and reconnected the battery (positive side) earlier, trying to get a "reset" on the unit, if you will, but had no luck. I don't understand how that ground wire, which was clearly making since the panel was lit up and even the fuel gauge was reading Empty before disconnecting it, could be the problem. Any ideas?

BTW, HAPPY NEW YEAR!