Axis Battery system check with digital volt meter

Electrical Troubleshooting 101

Troubleshooting electrical problems in your boat can be a frustrating task, but it does not have to be if you keep a few simple rules in mind: Every circuit needs a power source; most electrical devices require a minimum voltage to function correctly, and all circuits require continuity. Consequently, most electrical problems are caused by low voltage (or no voltage), excessive resistance, or a loss of continuity. 

1. What is the battery voltage?
Check battery voltage directly at the battery terminals. A fully charged battery should show around 12.5-12.7 volts. Perform a load test with a battery load tester to make sure there is not a bad or week cell in the battery.

2. Have you loosened, wiggled, and re-tightened the battery cables at the battery and engine?
Even though a battery cable connection may seem tight or clean, corrosion or even paint can cause a bad connection and can cause a

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