What Battery Terminal Do You Put On First. Clamp the negative cable black to the negative terminal of the good battery. There is a simple test you can carry out to determine the condition of your battery.
First try starting your car at night with the headlights switched on. If the headlights are overly dim put the vehicle in neutral or park if automatic and rev the engine. You should apply a tablespoon of petroleum jelly to each terminal.
Also question is which car do you put jumper cables on first.
If the headlights are overly dim put the vehicle in neutral or park if automatic and rev the engine. To be perfect remove the grounded terminal first usually it is the negative one unless you are working on a rare forklift or something. You really do not want this. Using petroleum jelly is another inexpensive way of preventing corrosion.
