Q: Reversed jumper cables and now car won't start even with a new battery.

asked by on

My car has an old battery that died. When jumping off the cable got reversed causing the battery to spark and the cables to get hot. I purchased a new battery, but the car will not start.

A number of things may have occurred when the jumper cables were reversed. The battery cables themselves may be fried and require replacement in order to start the vehicle. The PCM or the main computer in your vehicle may also have been fried in the process but the battery cables are the most likely cause. Even more unlikely but still a possibility is that your starter is even damaged. The first thing I would recommend is to have a qualified professional inspect your starting system for any signs of burning. These signs will be most noticeable where plastic exists such as the battery case of the old battery and the insulation of the battery cables. Have the technician also inspect the fuse box for any blown fuses or signs of burning in that area as well.

Was this answer helpful?
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. Reversed jumper cables and now car won't start even with a new battery.

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: Battery light and power steering

The power steering pump and the alternator which charges the battery are driven off of the same serpentine belt. Therefore, the first thing to check is the condition of that belt and whether belt tension is adequate. If there is...

Q: Power seat stuck

Hi there. The track assembly on your Jeep may have something binding the track. If the motor is turning but just not moving the seat, then the power seat motor gear is bad and the whole power seat assembly would...

Q: Car stalled & wouldn't start again. Replaced several parts & still not starting. Help? 2000 Dodge Stratus

You may be mistaken that the plugs are fouled with oil. Instead they may be fouled with fuel. Try to hold the throttle wide open and start the vehicle. You may need to see if the fuel pressure regulator is...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.