Which Car Battery Terminal Do I Disconnect First. Irlandes July 5 2016 1039pm 6. Battery voltage MUST be maintained to the PCM and other modules.
When removing the old battery remember to first disconnect the cables from the negative terminal which is usually black and has a minus - sign then disconnect the cables from the positive terminal which is usually red and has a plus sign. In this video I tell you the proper order for connecting and disconnecting car battery terminals. Electrically it doesnt matter but there is a good reason to disconnect the ground first then the positive and when reconnecting- to connect the positive first and then the ground This is because if you disconnect the negative first and you can touch the bodywork or some ot.
The negative terminal will be marked by a minus sign and black cable and the positive with a plus sign and red cable.
Disconnecting the car battery can create a. If you can just connect the positive red alligator clamp to the positive terminal and the negative black alligator clamp from the charger to a metal ground on the car or the negative battery post and plug the OPTIMA charger in to an outlet it will eventually turn on automatically and do the rest. What happens if you disconnect the positive terminal first. We live in Belleville Ontario area.
