2 of 3 gauges dont work

[wfy3432]

I have a 1986 18 ft Runabout SeaSprite Boat. I have 3 gauges, Speedometer, RPM and Fuel. The Speedometer works but the RPM and fuel doesn?t. It will turn on sometimes when out on the water but for the most part those two don?t work.

I checked the cables on the battery terminal to make sure they were tight and they were.

Any advice?

 

[Scott Danforth]

welcome aboard

the speedometer does not use voltage to run, the other two do. my guess, bad connection (+12 VDC)