Re: Help with dash board wiring
You really need to start with the boat side harness and identify what the wire colors are and what they are for. I explained how to identify the Start solenoid (S) and battery (B) and ignition (I) wires. Whatever the color is at the engine must mate up with whatever color the wire is from the applicable terminal on the ignition switch. Electricity doesn't care what color the wire is. Just mate them up end-to-end. Unless you have a diagram for your specific boat you won't know what those colors are. Your only option is to trace them. The other wires in the dash harness work the same way but you have the advantage of having the diagrams in the stickies to help you. Dash wiring for the gauges is very standard. But get the ignition worked out first. As shown in the diagrams, every gauge except the speedometer requires +12 volts when the key is on. The wiring is such that the +12 volt terminal on each gauge is daisy chained to the next one. That power comes from the "I" terminal on the switch. Every gauge(even the tach) requires ground. Those connections run in daisy chain fashion to wherever ground is on your boat. Each gauge has an internal light. The +12 volt feed for the bulbs is again daisy chained to the NAV/ANCHOR light switch. The voltmeter (if you have one) should now work with those three connections. The tach, oil pressure, water temp, and trim gauge all have a sender "S" terminal so there will be one wire from each sender at the engine that goes to the respective gauge. The fuel gauge sender is normally pink. But you can identify each wire by looking at the appropriate sender. Again, it doesn't matter what color the wire is at the dash. Just match them up.
