Re: Maxum electrical issues
Welcome to iboats!:welcome:
Unless someone messed with the original wiring scheme, you have three separate issues:
1. There should be a main fuse or circuit breaker on the positive feed for the fuse block. This should be within 6" to 12" of the battery. The nav lights and stereo should be fed by the fuse block.
2. The tachometer and temperature gauge get power from the ignition switch, which connects through the engine's electrical harness, not the fuse block. If the engine starts and runs, the harness has power. The gauges are connected to ignition switch and are daisy-chained together. They are also daisy-chained for the 12- side; this connection is going to use the same negative buss as the fuse block accessory circuits and may be part of the fuse block itself.
3. Except for the lighting, the speedometer isn't electrical. It use air pressure. There is a tube running from the speedometer to the stern, where it connects to either a pitot or to the lower unit. The hole in the pitot or lower unit may be clogged, the tube kinked or disconnected, or the speedometer itself is bad.
