You should put the clamps on the positive cable first.Smear grease or petroleum jelly (like Vaseline) on the posts to keep corrosion from building up.Use a disposable, lint-free cloth to dry off the terminals after you’ve cleaned them.For the terminal clamps, put a piece of paper through the hole & work on the inside. Turn it around, just as would when you’re tuning the radio. Wrap it around the battery post and push it down into the battery.Grab a piece of sandpaper the size of a credit card and fold it in half.If the toothbrush isn’t getting things done, you could use a battery terminal brush with stiffer bristles to get the job done. Now, dip a toothbrush into the mix and scrub the terminal posts as well as cable clamps. Mix a very little amount of baking soda with water. Clean Battery Connection Posts Battery Cleaning Agent Baking Soda If the engine starts without a problem, you’ve solved the problem, and the car can run. Don’t push too hard, or the screw will eat through the clamp groves and make it useless.ĭo it again for the second clamp. Slowly turn the screw & check to see if the clamp is in place. A good set of wrenches makes sure you have the tool for the job. As a last resort, you can read the engraving on the screw or use a simple ruler to understand its size. Make sure that loose cables are the problem-the easiest thing is to tighten the screws that hold them in place. You can add some petroleum jelly or lubricant over the cables and terminals. Connect the other cable and tighten the clamp. For example, if your car is negatively grounded, reconnect the positive one first. It’s time to reconnect the two cables, but start with the one which was disconnected last. Next, clean the terminals and the cables. Once disconnected completely, repeat for the other cable. Most modern cars have a negative grounding system. Now check the grounding system of the car (positive or negative) and disconnect it. Start by removing the the battery box cover. How Do I Fix A Bad Battery Connection?Ī battery cable should not move at all if it is properly tightened to the battery terminals, and you should not be able to move the cable end at all. If the issue persists, the battery or alternator may need to be replaced. To fix the problem, tighten the battery connections and clean any corrosion from the terminals. Loose car battery connections can cause a variety of issues, including a slow or intermittent engine start, dim headlights, and electrical issues with the vehicle.
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