lights on,gauges wacky

[james yarosz]

I have a 2003 Outback LS. We don,t use the boat much at night so the lights aren't on much.The other night we were out a little late so on the way in I flipped on the lights.When I turn the lights on the volt gauge goes to 0,and the oil gauge pegs all the way to the right.Any opinions?

[Yellowmobius]

Bad ground some where