Detecting Faults

Use a 12 V lamp connected to a three-foot piece of twin conductor cable or some other similar device.

Checking the cables with this instrument shows how far the current passes, and the defect can easily be located.

The most common fault is corrosion or poor connections. Deck sockets and fittings should be coated with petroleum jelly.

The battery terminals can be cleaned with a brush or a piece of emery paper. Apply grease when reconnecting.

CAUTION!

Always keep loose battery connection cables well away from the engine or fuel tanks, which are all earthed. If some of the batteries are still connected, a loose positive connection may even burn a hole in a fuel tank.