2. Inspect the terminals at the ends of the wires for cracks, exposed wires, and corrosion. The presence of loose white deposits under the insulation on the wire terminals indicates that the wiring is susceptible to corrosion. In this case, the wires should be replaced. Make sure that the battery terminals are not deformed or corroded, and that all terminal bolts are installed and tightened.
3. When replacing cables, always disconnect the negative battery cable first and connect it last. Otherwise, there is a possibility of short-circuiting the battery with the tool used to loosen or tighten the terminals. Even if you are replacing only the positive cable, make sure that the negative cable is first disconnected from the battery (Chapter 1 provides additional information on wiring maintenance).
4. Disconnect the wires from the battery, and then disconnect the opposite ends of the cables. Disconnect the wires from the starter solenoid valve, the distribution block located in the engine compartment, and (if necessary) from the ground loop contacts (see illustration). The original route of each battery wire must be noted.
4.4a. One of the positive battery leads is connected to a junction block located in the engine compartment
4.4b. Disconnect the wire from the generator
4.4s. Disconnect the wire from the starter
4.4d. The negative battery cable is attached to the engine block
5. If you intend to replace one or both wires, it is recommended that you take them with you to a car dealership to compare them with new cables. It is extremely important to replace the wires with new cables that are of similar length and diameter. The positive wire is highlighted in red and has a larger cross-section than the negative cable, which is usually highlighted in black.
6. Remove any corrosion from the threads of the starter solenoid valve clamp or ground loop connector. using a wire brush. Apply a thin layer of petroleum jelly or rust converter to the threads to prevent further corrosion.
7. Connect the wire to the terminal and tighten the fastening nut/bolt securely.
8. Before connecting a new cable to the battery, make sure that the cable reaches the terminal without tension.