Q: My negative battery cable start smoking when the car is running.

asked by on

My negative battery cable is smoking and is hot on the battery terminal when the car is running.I just put a new battery in last week but noticed a burning smell from the engine today. There is no engine light on battery light not on the car is running but the negative battery cable is smoking and hot.please help

My car has 118000 miles.
My car has an automatic transmission.

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. The recommended and safest practice is to replace the cable (cables can corrode within and cable crimps at the cable ends can’t be serviced without shortening the cable). When replacing, particular attention should be paid to the cleanliness and quality of the vehicle ground connection. This is a safety issue and consequently the repair is recommended at your earliest convenience. If you desire mobile service on this repair, the service to request is battery cable replacement and the responding certified mechanic will deal with it promptly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My negative battery cable start smoking when the car is running.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: What do the seat belt Warning Lights mean?

The seat belt Warning Lights are located on the instrument panel. When you or the front passenger are not wearing a seat belt, this light will illuminate, and be accompanied by a chime. When the belts are properly buckled, the...

Q: Q: Need to pass smog check

Hi, thanks for writing in. This is likely an issue related to the catalytic converter which may be the converter itself or the O2 sensor which is a sensor that monitors the productivity of the converter as it converts toxic...

Q: Transmission doesnt shift

You should first request a check engine light diagnostic in case there are stored trouble codes that implicate the transmission shifting fault that you are describing. If the stored codes do not implicate the transmission, or once those codes are...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.