When installing a car battery which terminal first

Do not tighten the hold-down bracket too hard, since this can damage the plastic case and cover. Attach both cables. Attach the positive red cable first, following with the negative black cable. Hand-tighten the nuts. I do see comments about removing battery cables to change the battery. In fact, two of my trickle chargers came with leads that permanently attach to the battery. The only thing they recommend is that if you use the clamps to attach the battery to the charger, you should attach the negative clamp to the body of the vehicle instead of directly to the negative terminal.

Besides the short circuit insurance issue there is a school of thought that says removing the negative first reduces the chances of a spark happening at the moment the circuit is opened and this spark igniting the hydrogen gas around the top of the battery,sounds like a Mr wizard issue to me.

Whitey, I misread the post. Remove the ground first. After the ground is open, it no longer matters if you accidently touch the wrench to the frame while loosening the positive. Years ago, I saw someone with a missing ring finger. He accidently shorted a car battery to ground with his wedding ring and the ring turned red hot and injured the finger so badly that it had to be amputated.

When connecting a battery charger, I connect the positive lead first. Sometimes, simply removing this gunk, cleaning the battery terminals and tightening the seal would solve the problem of a bad battery. There are times when the diode in the alternator malfunctions, and this is causing the battery drain. When you go to an auto parts store, bring this information plus info on the make, model and engine size of your car. Better yet, bring the old battery to the store.

But to be able to bring the old battery to the auto part store, you should know how to remove the old battery first. The instruction on how to do this is given in detail below. If you are going to change your battery inside your garage, make sure that the surface is level and there is no open flame nearby. Refrain from smoking or admonish anyone close by not to smoke too. In most cars, the battery is situated in the trunk; in some under the hood or under the floorboard and in others, concealed from view inside the wheel well.

In some cases, it will be the cable of the positive terminal that will be colored red and black cable for the negative terminal. In detaching the terminals, you start with the negative. Commercial Vehicle K K Find a dealer. Which car battery terminal to connect first? Installing the new battery Before placing the new battery in position, ensure that both terminals and the cables are rust-free.