Gauges don't work

[beckoning]

Just bought the 2005 G3 boat (19') with 150hp Yamaha. Motor and boat come from Yamaha as a package. Neither the tilt gauge nor the volt gauge seem to work. Where to start with diagnosing? My first step will be to take the screws out of the instrument panel and lift out the entire panel for access to the back of gauges, and check wiring. Are the gauges fused? Does anyone have a wiring diagram. Call Yamaha? What could be the problem?

 

[MikeSchinlaub]

I'm not an expert on the electrical stuff, but there should be a fuse panel somewhere. Also, the gauges are all chained together with jumper wires. The jumpers are the power supply to the gauges. So those would be good things to check, fuses and good connections on the power wires.

 

[jlh3rd]

there should be a purple colored wire running to those gauges that supply power from the ignition switch normally. I'm assuming yamaha follows marine wiring color schemes.
So if you pull the panel, check for voltage at that wire when turning the ignition switch on. If no power, then work backwards.