Skip the auto shop - Our mechanics make house calls

Q: Car will jump start fine. But when I try to start it from the new battery, it all goes black and power goes out completely

asked by on

I have replaced the battery after noticing that my Jeep Cherokee Sport (99) will crank fine with jumper cables. When I replaced the battery I got in to try to crank it and the dome light was on with the door opened. When I turn the key nothing happened except for the light going out completely. Happens every time. It jump starts fine. It looks good when the new battery is connected. Turn ignition - motor does nothing / power blacks out.

A: Hi there. It sounds like your new battery m...

Hi there. It sounds like your new battery may be faulty. If the vehicle jump starts ok, then this is a sign that the new battery is not providing enough cranking amps to engage the starter. It may have a bad cell that is causing your symptoms. A bad cell prevents the battery from operating properly and can wreak havoc on electrical systems. The only repair is to replace the battery if this is the case. Have the battery tested with a digital battery tester that provides current voltage, cold cranking amps, and state of health. I suggest having a qualified technician perform an inspection to confirm this and avoid replacing any unnecessary parts. YourMechanic has several available technicians that can assist you with a no-start diagnostic so the correct repair will be done.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: New battery and car still won't start.

If there is a problem with the starting system, the car may not start due to a problem with the battery, alternator, and/or starter. It is possible that the car will not start even when the battery is new if...

Q: My car isn't staying charged after a jump, it lasts about two minutes before the engine dies. I'm wondering if it's the alternator.

This may be related to a couple of different things. The fact that it must be jumped to get it started is usually a sign of a dead battery or an alternator that may not be working. In rare cases...

Q: Car switched off but did not start when I tried to restart

Hello. First of all, rotating the engine counterclockwise could very well cause the engine to "jump time", and cause engine damage. The timing chain tensioner is not designed for this pressure, and can allow the timing chain to jump one...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...