Check the ground strap from the back of the motor to the firewall. Was this answer helpful. How To Clean Battery Terminals Advance Auto Parts Answer 1 of 22. . The battery cables can spark if the cables are installed in the improper order. Disconnected battery to change the dash out. The first point is the positive terminal and voltage flows to the negative terminal through the negative clamp. Discussion Starter 1 Aug 18 2006. Negative battery terminal sparks while starting. Do not connect the. Gently pour this solution over one battery post at a time and wait for the solution to begin bubbling as it neutralizes any corrosive acid accumulation on and around the post. Only show this user. The sparking when you make the last connection should be kept to a minimum by making a solid connection the first time. Also the ground or negative cable should not be touching anything metal while the pos...