Wire a 36-volt golf cart by connecting six 6-volt batteries in series. In a series circuit, the total voltage is equal to the sum of the individual voltages, and all six batteries act as a single 36-volt battery.
Begin by locating the battery compartment, normally found under the seat. Because all six batteries act as a single battery, there is one wire that acts as the main positive lead for the entire battery bank. Connect this wire from the golf cart frame to the positive terminal of the first battery in the bank. Connect a cable from the first battery’s negative terminal to the positive terminal of the second battery. Connect the positive terminal of the second battery to the negative terminal of the third, and continue connecting positive to negative until all batteries are connected.
Finally, connect the last battery’s negative terminal to the golf cart frame or controls, completing the circuit. Ensure all of the batteries are secured to the cart and all connections are tight before replacing the seat. Because the batteries are connected in series, all six batteries and their connections must be good for the circuit to work properly. If one battery is bad, there may not be enough power for the cart to function, and a broken or disconnected cable interrupts the circuit and prevents it from working.