On almost every car made in the last 60+ years the system is negative ground. So you want to hook the positive up first that way if your wrench slips while tightening it, it will not short out to the chassis.
Always connect the positive (RED) cable first.
When charging a battery, you should always connect the red cable first before the black cable.
Something is on drawing power from the battery. Always connect the positive cable first and the negative cable last.
red or positive
When charging a battery, it is recommended to connect the red cable first, followed by the black cable. This is the standard procedure to ensure safe and proper charging.
To jump start a car, first connect the red positive cable to the positive terminal of the dead battery, then connect the other end of the red cable to the positive terminal of the working battery. Next, connect the black negative cable to the negative terminal of the working battery, and finally connect the other end of the black cable to a metal surface on the car with the dead battery, away from the battery. Start the working car and let it run for a few minutes before attempting to start the dead car. The red cable should be connected first.
connect the positive (red) cable first then negative (black)
Always remember this rule. To take off_ Negatice first To put on, Positive first.(Red One)
When jump-starting a car, you should connect the red jumper cable to the positive terminal of the dead battery first.
Connect the positive + red charger cable to the positive + red battery post. Then connect the negative - black charger cable to the engine somewhere. Most engines have something metal sticking up that you can connect to. Do not connect the negative charge cable to the negative battery post, always connect it to the engine.
Connect the positive (+) Red cable from the charger to the positive (+) post of the battery. Now connect the negative (-) Black cable to a metal part of the engine. Do not connect to negative battery post. Plug the charger in. Unplug the charger before removing the cables. Disconnect the negative cable first.
1. connect red booster cable to weak battery POSITIVE post. 2. connect red cable to POSITIVE post on booster battery. 3.connect black cable to booster battery NEGATIVE post. 4.make final connection on engine block of stalled vehicle away from the battery. STAND BACK,start vehicle and remove cables in reverse order of connection by disconnecting engine block connection first.