Marine Electrical
Most boat electrical problems are connection problems. Corroded terminals, chafed wiring, failed grounds, and tired batteries account for the majority of what stops working on a boat, and they rarely announce themselves before something quits.
Precision Marine handles marine electrical troubleshooting and repair across Chicago and the greater Chicagoland area, mobile and dockside.
Common marine electrical problems
Something works intermittently. Almost always a connection. A corroded terminal, a loose ground, or chafed insulation making and breaking contact with movement.
Batteries will not hold a charge. Age, a failed charger or converter, a bad isolator, or a parasitic draw pulling the bank down while the boat sits.
Lights and accessories are dead. A blown fuse, a tripped breaker, a failed switch, or a break upstream in the circuit.
The bilge pump will not run, or runs constantly. A failed float switch, a seized or burned pump, a corroded connection, or a blocked or leaking discharge line letting water return to the bilge.
Corrosion at the panel or connections. Salt and damp attack every termination on a boat, and the resulting resistance shows up as dim lights, slow motors, and equipment that quits under load.
What service covers
Battery and charging system diagnosis, service, and replacement, including chargers, isolators, and battery switches. Navigation, anchor, and cabin lighting. Switches, fuses, breakers, and panel work. Accessory and instrument circuits. Corroded connection repair and re-termination. Wiring faults, chafe, and grounding problems. Bilge pump testing, replacement, and float switch faults, along with discharge line blockage and leaks.
Why marine electrical systems fail
A boat is a hostile place for wiring. It vibrates, it moves, it is damp, and in salt air every dissimilar-metal junction is a corrosion site. A connection that would last decades in a house is a wear item on a boat.
That is why chasing a symptom by replacing the component that stopped working is so often the wrong move. The light that failed is rarely the problem. The connection feeding it usually is.
Bilge pumps deserve particular attention because they fail silently. A pump that has quit gives no indication until water is where it should not be, and float switches are among the most common failures on any boat.
FAQ
Why does my bilge pump run constantly?
Either water is genuinely coming in, or the float switch has failed closed, or the discharge line is blocked or leaking back into the bilge so the pump keeps re-pumping the same water.
How often should bilge pumps be tested?
Regularly, and before any trip. A bilge pump gives no warning that it has failed until it is needed.
My electronics work sometimes and not other times. What causes that?
Intermittent faults are almost always connection faults. Corroded terminals, loose grounds, or chafed wiring making and breaking contact.
Why do my batteries keep going flat while the boat is docked?
Usually a parasitic draw, a failed charger or isolator, or batteries at the end of their service life.
Do you do full rewires or shore power installation?
Scope varies by job. Call and describe what you need and you will get a straight answer about whether it is something Precision Marine handles directly.