Hooking up battery cables the wrong way

Battery terminals connected wrong way around!! Now what???

hooking up battery cables the wrong way

What happens when you Jump Start your car the WRONG WAY!


You simply need a car with a well-functioning battery and jumpstarting cables. Connect positive to positive and negative to negative. Unfortunately, things may not always go as planned. There are some instances wherein you might not do it the right way. What happens when you jumpstart your car the wrong way? This is exactly what we will be exploring in the rest of this post.

Almost all drivers know that a car with a dead battery can be started by jumping it from a car with a charged battery. Automotive batteries are designed to produce the high electrical current required to start the engine. This routine procedure can become dangerous if the jumper cables are connected improperly -- if the positive terminal on each battery is mistakenly connected to the negative terminal on the other battery. Damage will result from very high current flow, and possibly from incorrect polarity on the "dead battery" vehicle. Connecting the positive terminal of each battery to the negative terminal of the other battery will result in a huge surge of electrical current between the two batteries. This will cause the batteries to heat very quickly, and in lead-acid type batteries -- the most common type -- it will result in the generation of a large amount of hydrogen gas within the charged battery.

Car owners may accidentally connect the jumper cables in reverse order or install the battery backward. The vehicle may no longer start. The purpose of this .
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Car owners may accidentally connect the jumper cables in reverse order or install the battery backward. The vehicle may no longer start. The purpose of this troubleshooting guide is to help answer the following questions:. Connecting the jumper cables backward or installing a new battery the wrong way is never fun. Car will no longer start. Dashboard lights are off, and everything is dead. Key may not even turn the ignition.

This website is supported by the contributions of our members. To review the Contributing Member Benefits. If you would like to keep this website up and running, please consider contributing:. Battery connection accidentally reversed. On connecting the second terminal I noticed a small spark followed by a 'frying noise' from the front of the car.

I recently took my Ford Escort wagon , miles to a well known chain to have the battery replaced. When they put installed the battery, they hooked it up backwards and blew the main fuse. Taking it back, they confirmed that the alternator was dead and replaced it with me paying for it. The radio still does not work and the tailgate light is blinking on-and-off. I understand that attaching the battery incorrectly may blow the alternator, it seems way too much of a coincidence.

What Happens If Jumper Cables Are Reversed on a Battery?


During the process of charging the battery, you may accidentally mix up the cables and put the wrong one on the incorrect terminal. When this happens, it could.
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