So we know that batteries get warm and heat up when being used or charged. If battery cables and connectors get hot enough to melt their insulating material, you have a problem. Sulfuric battery acid can also reach the copper cables by burning holes through the cable insulation corroding the copper wire.
Q. What would cause battery cables to get hot?
Usually high resistance (poor connection) will cause wires to get hot. Check both ends for being tight and corrosion. The biggest reason a battery terminate or connection would get hot is the connection is lose. That along with the high amount of power it is using to try and start will make it get very hot.
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Q. Why does negative battery cable get hot?
Usually high resistance (poor connection) will cause wires to get hot. Check both ends for being tight and corrosion. The biggest reason a battery terminate or connection would get hot is the connection is lose.
Q. Why is my battery cable smoking?
There is a faulty, high resistance (often due to corrosion, wire defect or break or loose mechanical connection) connection at the battery post and/or at the vehicle ground(s) at the frame. When replacing, particular attention should be paid to the cleanliness and quality of the vehicle ground connection.
Q. What to do if a battery starts smoking?
If the battery starts smoking during charging, disconnect the charger immediately. The problem might be overcharging, which can only be stopped by disconnecting the charger and letting it cool. You should also check the charger to ensure it is in good condition.
Q. How often do battery cables need to be replaced?
50,000 to 100,000 miles
Q. Can a bad terminal drain a battery?
Loose terminal connections won’t drain the battery. They can prevent the battery from being charged, properly which will look like the battery is being drained. Loose connections will also prevent electrical systems from operating properly. A loose battery terminal will not allow the battery to charge properly.