Q: How to replace battery cables in a Toyota Land Cruiser?
A: If the stereo in your vehicle has an anti-theft system, ensure you have the correct activation code before disconnecting the battery. Periodically inspect the entire length of each battery cable for damage, cracked or burned insulation, and corrosion. Poor battery cable connections can cause starting problems and decreased engine performance. Check the cable-to-terminal connections at the ends of the cables for cracks, loose wire strands, and corrosion. The presence of white, fluffy deposits under the insulation at the cable terminal connection indicates corrosion and the need for replacement. Check the terminals for distortion, missing mounting bolts, and corrosion. When removing the cables, always disconnect the negative cable first and hook it up last to avoid shorting the Car Batteries. Even if only the positive cable is being replaced, be sure to disconnect the negative cable from the battery first. Disconnect the old cables from the battery, then trace each of them to their opposite ends and detach them from the Starter Solenoid and ground terminals, noting the routing for correct installation. If replacing the old cables, take them with you when buying new ones to ensure identical parts. Positive cables are usually red, larger in cross-section, and have a larger diameter battery post clamp, while ground cables are usually black, smaller in cross-section, and have a slightly smaller diameter clamp for the negative post. Clean the threads of the solenoid or ground connection with a wire brush to remove rust and corrosion, and apply a light coat of battery terminal corrosion inhibitor or petroleum jelly to prevent future corrosion. Attach the cable to the solenoid or ground connection and tighten the mounting nut/bolt securely. Before connecting a new cable to the battery, ensure it reaches the battery post without needing to be stretched. Connect the positive cable first, followed by the negative cable.