Ground Issue

What model and year?

Definitely need to know what model and year. Bad grounds are a known issue with older boats and a fairly straight forward fix. Most run a new ground and a new power line from the engine to the dash, you can look up posts on how to do it.

The next step is to rewire the dash, more complicated but not really hard if you take your time and have the proper terminals and wire. Rewired my dash two years ago, picture below. It was simple to completely remove it from the boat and move it to the island in the kitchen to rewire for a couple of weeks during the winter. i upped the wire gauge one size and rewired the daisy chain system to solve some built in issues. Solved most of my electrical issues and now I know to look elsewhere whenever any electrical problems pop up.

Once the dash was back in the boat, I ran a new ground from the black ground terminal block to the back of the engine and a new power wire from the red power terminal block to the solenoid.

First picture shows the rewired dash. Second picture shows the new red power and black ground landing on the solenoid and the engine. you can see them zip tied together right side middle of the picture.

William,
I recently needed some marine wire for some nav lights and the best price I found was at Best Boat Wire

They also have the adhesive lined heat shrink crimp on connections

andrewmarani wrote: That's a nice site. Would have saved me a lot of internet searching when i was buying wire and terminals for the boat. I recommend the below tool for doing crimps. You really can't crimp this stuff properly without a good crimping tool. The one below comes with six different heads, so far i've used three different heads on various electrical projects. Definitely one of my better tool buys. https://www.amazon.com/gp/product/B0045CUMLQ/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

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