When I put my 77 550 in the garage in the fall, everything was working fine. I touched nothing over the winter, and now when I turn on the ignition and start the bike the gauge lights are off. Nothing in the light bucket was loose - all wires seem fine. Then I noticed that the gauge lights WILL work when the key is turned to the Park position (and of course the headlight goes out). What the heck? I know nothing has been touched over the winter, can this be a bad ground somewhere?