Which Battery Cable Do I Connect First. Disconnect the red or positive cable first then the negative black cable. Connect Negative Cable to Ground.
When disconnecting the cables from the old battery disconnect the negative first then the positive. Then connect the Negative - cable to the negative - battery post. Positive current on the other hand flows into the circuit from your battery.
Attach the negative or black clamp to the negative terminal on the supply battery.
Connect the cables Red first and replace the cover on the battery. Which to Connect First Connect Positive Cables First. 30 Day Return Policy. There will be no spark because the ground is open.
