GM 21019686 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 connections 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 negative cable from the negative battery post first and hook it up last to avoid shorting the battery. Before disconnecting any cables, note the routing of both cables to ensure correct installation. Disconnect the old cables from the battery terminals, then disconnect them at the other end(s). Trace each cable from the battery down to its lower end and disconnect it. The smaller ground cable is bolted to the body and the larger ground cables are attached to the transaxle. The starter cable is connected to two terminals on the starter motor solenoid. Although you could remove or cut off the electrical tape that bundles the harness together, it is not recommended. Instead, remove the battery to give yourself some room to work. Then locate the point at which the two cables disappear into the harness and the point at which they emerge from the harness down below, cut off the old cables at those points and tape up the exposed ends to prevent corrosion. Positive cables are almost always red and larger in cross-section; ground cables are usually black and smaller in cross-section. Clean the threads of the starter 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 lower ends of the cables first, then connect the positive cable to the positive battery post. Where the cables parallel the wiring harness containing the remains of the old cables, attach them to the harness with several cable ties. If either cable is supposed to be secured by any brackets or clips, make sure that you reattach them. After both cables are completely installed, reconnect the ground cable to the negative battery post. When the battery has been disconnected, the PCM must relearn its former driveability and performance characteristics.

Attach the lower ends of the cables first, then connect the positive cable to the positive battery post. Where the cables parallel the wiring harness containing the remains of the old cables, attach them to the harness with several cable ties. If either cable is supposed to be secured by any brackets or clips, make sure that you reattach them. After both cables are completely installed, reconnect the ground cable to the negative battery post.