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

asked by on December 21, 2015

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.

Car is not starting Inspection $79.99 - $99.99 Get a Quote

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

Car having electrical problems accompanied by a loud clicking.

Hi there. There are many circuits that can cause this to occur. The most common problem on this vehicle would be a bad connection or a bad battery. The battery needs to be load tested to see if it is...

My abs light came on,brake pedal goes to floor but seems like only front is grabbing

Hello. If you are losing brake fluid, then there is a leak somewhere. Look for wet areas indicating where the leak may be. You may have blown a wheel cylinder of a brake line somewhere on the truck. Have a...

Check engine light comes on and car does not start.

Let's start with your low battery issue. It sounds like something in the electrical system is staying on over night that shouldn't be. Your intermittent Check Engine Light sounds like it could be related to your idling issue. My advice...

My clutch pedal sucked to the floor just had the clutch replaced two months ago 2000 Ford F350 Super Duty

Hello - your symptoms suggest the clutch hydraulics or mechanical linkage components have failed completely. The OEM clutch line includes a "quick-connect" fitting that may have come loose or failed, given the recent maintenance. Checking the fluid level, and that...

Ignition makes clicking sound

This can be caused by either a low battery charge level, or a loose connection in the starter circuit. The battery needs to be fully-charged, and load-tested, to ensure it is not the issue. All starter wires need to be...

Truck hard to start and seems to be a fuel injection problem.

The issue may or may not be the Fuel Injection Control Module, but the issue is certainly fuel related. I would recommend having your truck inspected by a professional who is experienced with diesel engine diagnosis. It is possible that...

Car won't turn over

Hello there, a no-start condition is a very common fault. The most likely causes for this to happen on your 1999 Plymouth Breeze would be a battery, starter, battery cable, ignition switch, wiring harness fault, or an open circuit. Have...

Ignition cylinder locked up.

Try all available keys you have and turn the steering wheel towards the center to ensure the steering wheel lock is not binding and preventing the key from being turned. If keys are excessively worn you may want to get...

I was sitting at a stoplight land my car was out about 150 degrees, then the temperature shot up

Claimed by John Hege

Related articles

How to Buy RV Batteries
RV RV (recreational vehicle) batteries come in many different types, and what type is best depends on the useage and conditions the RV will be exposed to. Unlike cars, RV’s use multiple batteries. These batteries are used to power many...
What Is the Difference Between Conventional, Electronic and Distributor-less Ignition Systems?
If If you’re like many people, you know that when you turn the key in your ignition, the engine cranks and you’re able to drive your car. However, you might not know how that ignition system works. For that matter,...
What Is the Difference Between Conventional, Electronic and Distributor-less Ignition Systems?
If If you’re like many people, you know that when you turn the key in your ignition, the engine cranks and you’re able to drive your car. However, you might not know how that ignition system works. For that matter,...