It’s very annoying when turning the key, and realizing that it won’t start. If you notice that the battery cables are hot to the touch, it’s a sign that something is wrong. In this article, we’ll take a look at why battery cables get hot and the car won’t start and how to fix it.
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Why Do Battery Cables Get Hot?
There are a few reasons why battery cables get hot, including:
Poor Connections
Poor connections between the battery terminals and the cables can cause resistance, which leads to the cables getting hot. Over time, corrosion can build up on the terminals, which can interfere with the flow of electricity. When this happens, the cables get hot as they try to compensate for the resistance.
Overheating
Another reason why battery cables can get hot is due to overheating. When you crank the engine, the battery sends a large amount of current to the starter motor, which can cause the cables to overheat. This is especially true if the battery or starter motor is already weakened or damaged.
Short Circuits
Short circuits can also cause battery cables to get hot. A short circuit occurs when there is a direct connection between the positive and negative terminals of the battery. This creates a large amount of current that the cables can’t handle, which can cause them to get hot.
Why Does Car Won’t Start When the Battery Cables Get Hot?
When the battery cables get hot, it can cause the car not to start. This is because the cables are not delivering the necessary power to the engine to start it up. If you notice that the car won’t start when the battery cables are hot, it’s likely that there is an issue with the electrical system.
How to Fix Battery Cables Hot Car Won’t Start
There are a few things that you can do to fix battery cables getting hot and the car not starting:
Clean the Battery Terminals
If the battery terminals are corroded, it can cause resistance and lead to the cables getting hot. You can clean the battery terminals with a wire brush and baking soda and water solution to remove any corrosion.
Tighten the Connections
If the connections between the battery terminals and the cables are loose, it can cause resistance and lead to the cables getting hot. You can tighten the connections with a wrench or pliers to ensure a secure fit.
Replace the Battery Cables
If the battery cables are old or damaged, they may need to be replaced. New battery cables will provide better conductivity and reduce the risk of overheating.
Check the Alternator
The alternator is responsible for charging the battery while the car is running. If the alternator is not working correctly, it can cause the battery to drain and the cables to get hot. You can test the alternator with a multimeter to see if it’s delivering the proper voltage.
Check the Starter Motor
The starter motor is responsible for turning the engine over when you turn the key. If the starter motor is damaged, it can cause the battery cables to get hot. You can test the starter motor by checking the voltage and amperage with a multimeter.
Tips for Preventing Battery Cables from Getting Hot
In addition to knowing how to fix battery cables getting hot and the car not starting, there are some things you can do to prevent this issue from occurring in the first place:
Regular Maintenance
Regular maintenance is essential to keeping your car in good working order. Be sure to have your car inspected by a qualified mechanic at least once a year, and keep up with routine maintenance tasks like oil changes and tire rotations.
Clean Your Battery Terminals
Cleaning your battery terminals on a regular basis can help prevent corrosion from building up and causing resistance, which can lead to hot battery cables. You can use a wire brush and a baking soda and water solution to clean the terminals.
Use High-Quality Battery Cables
Investing in high-quality battery cables can help ensure that your electrical system is working properly and prevent the cables from getting hot. Look for cables with thick insulation and high-quality connectors.
Avoid Overheating
Avoiding overheating is key to preventing battery cables from getting hot. If you notice that your car is overheating, be sure to turn off the engine and let it cool down before trying to start it again.
Conclusion
Battery cables getting hot and the car not starting is a sign that there is an issue with the electrical system. However, by knowing the root causes of the issue and taking the necessary steps to fix it, you can keep your car running smoothly and avoid further problems down the line.
Remember to practice good maintenance habits, keep your battery terminals clean, use high-quality cables, and avoid overheating. By doing so, you can help prevent battery cables from getting hot and ensure that your car is always ready to go when you need it