GMC 88986775 Cable Asm,Battery Negative

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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 that the cable is corroded and should be replaced. Check the terminals for distortion, missing mounting bolts and corrosion. When removing the cables, always disconnect the cable from the negative battery terminal first and hook it up last or the battery could be accidentally shorted by the tool you're using to loosen the cable clamps. Even if you're only replacing the cable for the positive terminal, be sure to disconnect the cable from the negative battery terminal first. Disconnect the old cables from the battery, then trace each of them to their opposite ends and disconnect them from the ground terminals, alternator, fuse box and starter solenoid. Note the routing of each cable to ensure correct installation. If a cable is bundled with another wiring harness, cut the electrical tape tying them together, remove any protective sheathing and separate them. If you are replacing either or both of the battery cables, take them with you when buying new cables. It is vitally important that you replace the cables with identical parts. Cables have characteristics that make them easy to identify: positive cables are usually red and larger in cross-section; ground cables are usually black and smaller in cross-section. Clean the threads of the solenoid or ground connection with a wire brush to remove rust and corrosion. Apply a light coat of battery terminal corrosion inhibitor or 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. Before connecting a new cable to the battery, make sure that it reaches the battery post without having to be stretched. Connect the positive cable first, followed by the negative cable.