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When connecting your battery, connect the positive (red) first and the negative (black) second. When removing the battery, disconnect the negative (black) first and the positive (red) second. Been doing this for nearly 30 years. ALWAYS connect the positive post first.
Take both cables off the battery posts, starting with the negative cable. Disconnect the negative cable from the engine block. Remove the positive cable from the solenoid, relay or starter. Clean both battery posts with a wire brush. Connect the positive cable to the solenoid, relay or starter.lways start with the positive (+) cable. Connect the other end of the jumper cable to the positive (+) side of the fully charged battery. Connect the negative (-) side of the jumper cables to the fully charged battery first. Connect the other end of the jumper cable to the engine.