The red one is positive the black one is negative.
Positive and negative car battery cables.
If you first connect the negative cable then when you connect the positive cable there is a chance the wrench will complete a circuit.
One is marked positive the other negative.
Disconnect the cables in the reverse order.
Allow the engine to run for approximately 30 minutes so that the alternator can charge the battery.
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Negative cables bolt directly to the body of the car or engine block positive cables attach to the starter.
Find the red positive and black negative battery terminals.
Remove the positive jumper cable from the vehicle that needed a jumpstart.
Sometimes you can attach the negative cable to the negative pole of the donor battery and instead of attaching the other end to the negative pole of the discharged battery clamp it to a metal piece.
Remove the negative and positive jumper cables from the vehicle with the known good battery.
The battery will have labels marked with a and a sign.
There are also positive and negative cables in the jumper cable set.
Each battery has two metal terminals.
The plus is the positive cable terminal the is the negative.
Find the batteries and their terminals.
Then remove the positive cable from the car with the good battery don t touch a grounded part of either car with the clamp of the positive cable.
Positive and negative battery cable are made for a specific connection between a vehicle and the car battery.
It is only a safety issue.
First remove the negative cable from the car you jumped then the negative cable from the car with the good battery.
I am assuming you are referring to installing a battery not performing a jump start.
Second always remove the battery s ground clamp before loosening the positive.
If you remove the negative clamp and inadvertently complete a circuit to ground there will be no current flow.