In this episode, Barry demonstrates how to install a heavy-duty solenoid with 650 AMP Alltrax controller on an EZGO TXT 2003 golf cart. Adding a new heavy-duty solenoid and controller will give the golf cart more torque and acceleration. For safety reasons, remember to unhook at least one battery cable to ensure no accidental discharges. First, you remove the old controller, isolating the wires for easy reassembly later; then Barry marks all cables with masking tape to help identify wires. The wiring can be confusing, so organization is key. Next, Barry removes the old solenoid, careful not to touch the two terminals together. Once the old solenoid and controller are removed, the new ones are mounted and carefully rewired.