Our ride on mowers operate very similarly to our cars – they are both powered by batteries that are connected to the electrical systems of the vehicles. Unlike our cars, however, some of the electrical devices in our mowers connect to the chassis rather than directly to the battery. It is for this reason that the battery must be grounded (or electrically connected) to the chassis of our mower. This is a fairly simple process, providing you know what you are doing.
Step 1: Drill a small hole into the chassis of your mower. It doesn’t matter where, as the entire chassis will conduct electricity.
Step 2: Take some wire and run it from the negative terminal of the battery to the hole you have drilled. Cut the wire to length, and strip about half an inch of insulation off either end. Crimp a ring terminal onto each end of the wire.
Step 3: Loosen and remove the nut on the negative terminal of your battery and place the ring terminal over the screw. Replace and tighten the nut so that the wire is held firmly to the battery.
Step 4: Take a sheet metal screw and place it through the ring terminal on the other end of the wire. Put the screw through the hole you have drilled and tighten it so that the wire is held firmly against the chassis.
Your ride on mowers battery has now been successfully grounded. When you start the mower, you should be able to check whether you have connected the wires correctly by trying to use some of the electrical devices that you know connect to the chassis (such as the alternator). If they don’t work, check that you have attached the wire to the negative terminal and not the positive.