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What happens to a car if when attempting to boost a dead battery you inadvertantly cross the positive and negative on the dead battery?

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2010-01-11 17:31:57
2010-01-11 17:31:57

If you cross the neg. with the pos. on a battery you could blow up both batteries and also blow the fuses on both cars.

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Related Questions


Positive to positive, negative to negative if you are asking about installing one battery in a vehicle.



Outside the battery, it is negative to positive and inside the battery it is positive to negative.


Connect a battery charger to battery positive to positive negative to negative


The positive end of a battery goes to the positive end of the terminal. In retro spec, the negative end of a battery goes to the negative end of the terminal.


There are 2 battery terminals. A positive or hot and a negative or ground. The positive is slightly larger than the negative.


red is positive on a negative ground system


What happens when you inadvertently crossed the positive battery terminal from a negative to a positive and a positive to a negative.?Read more: What_happens_when_you_inadvertanly_crossed_the_positive_battery_terminal_from_a_negative_to_a_positive_and_a_positive_to_a_negative.


Positive+ (RED) goes to positive + on battery. Negative - (Black) goes to negative - on battery.


Positive (Red) to positive post on battery. Negative (Black) to negative post on battery.


Connect the Positive + battery cable to the positive + battery post first. Then connect the Negative - cable to the negative - battery post.


The negative terminal of a battery has a - sign and positive terminal has a + sign.



The negative battery terminal is on the battery. They don't have a wire coming from it like they do the positive. For charging purposes, the engine block acts as the battery ground. When disconnecting the negative at the battery, the negative terminal usually has a black wire and the positive has a red.


usually it should, but if it doesn't show then the flat side is negative and the tip is positive, On an automotive battery the larger post is positive +.


take a small wrench and undo the positive and negative battery cables from the posts. take the old battery out and put the new one in place of the old one, and reconnect the positive to the positive post and the negative to negative.


There is no standard for locating the positive or negative posts on a battery. You must look fot the " + " symbol on the battery. The positive post is slightly larger than the negative post.


positive and negative terminals and the battery case


I assume you're asking how can you tell which is positive and which is negative? The red cable is positive in the black cable is negative. But if they are not color-coded the positive battery post is slightly larger than the negative battery post. If you try to connect the negative cable to the positive post it would be a tight fit and if you connect the positive cable to the negative post it would be loose.


If you connect positive to positive and negative to negative you will have a 9V battery with twice the current capacity in milliampere hrs than a single batteries. The load then goes between positive and negative paralleled terminals. If you connect one negative of one battery to one positive of the other battery and put the load between the remaining negative and positive terminals you have created an 18 V battery with the same milliampere hr rating as a single battery. If you connect one negative to positive of other battery and the negative of that battery to the positive of the first battery then both batteries with quickly drain and get hot in the process. Contrary to folklore or urban lefends, they do not explode.



Red, positive + cable to Positive + battery terminal. Black, negative - cable to Negative - battery terminal.


On any car, switching the battery hookups will most likely fry your battery.


The positive pole on the battery is the anode. The negative pole is the cathode.


Positive to positive and negative to negative. The negative will be connect to the engine or chassis. The positive will be connected to the starter.



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