A: 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 is a sign the cable is corroded and should be replaced. Check the terminals for distortion, missing mounting bolts or nuts and corrosion. When removing the cables, always disconnect the negative cable first and hook it up last or the battery may be shorted by the tool used to loosen the cable clamps. Even if only the positive cable is being replaced, be sure to disconnect the negative cable from the battery first. Caution: On models equipped with the Delco Loc II audio system, be sure the lockout feature is turned off before performing any procedure which requires disconnecting the battery. 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. Note the routing of each cable to ensure correct installation. If you're replacing either or both cables, take the old ones with you when buying the new ones-the replacements must be identical. Cables have characteristics that make them easy to identify: Positive cables are normally red, larger in diameter and have a larger diameter battery post and clamp; ground cables are normally black, smaller in diameter and have a slightly smaller battery post and clamp. Clean the threads of the solenoid or ground connection with a wire brush to remove rust and corrosion. Apply a light coat of petroleum jelly to the threads to prevent future corrosion. Attach the cable to the solenoid or ground connection and tighten the mounting nut/bolt securely.