Battery is dying, jump start did not work

My battery has been dying lately in my XTS Platinum. And it’s really causing me a lot of inconvenience and problems. I parked my car in the morning, and when I came back to it at night the battery was dead. I couldn't open the doors. So I wasn't able to get the car jumped. The key fob didn’t work with a dead battery. I had to take a cab home and have the car towed to the dealership. I had to have it towed from home once, too. I don’t know why this is happening. I turned everything off before locking my car. Lights must not be turning off inside that should be. Is there
Experienced mechanics share their insights in answering this question :
To find a way to decrease the delay for the lights, consult the owner’s manual for the specific steps to change the delay. Otherwise, there may be a faulted circuit allowing a component to stay powered up with the ignition off. In this case, a parasitic drain test must be performed on the vehicle to point out which circuit is at fault, then the mechanic can follow the devices on the circuit to find the problem and diagnose your battery issue.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The most common reasons a Cadillac XTS won`t start are a dead battery, an alternator problem, or failed starter.
Your car`s ignition switch, alternator, battery, starter, or a fuse could be malfunctioning. Your safety switch could be broken. This switch keeps your transmission from starting unless you`re in park or neutral. If it is malfunctioning, it will keep your car from starting.
The most common reasons a Cadillac CTS won`t start are a dead battery, an alternator problem, or failed starter.
The most common reasons a Cadillac CTS won`t start are a dead battery, an alternator problem, or failed starter. Search our network of RepairPal Certified shops near you to speak with a technician about your issue.
If your vehicle won`t start, it`s usually caused by a dying or dead battery, loose or corroded connection cables, a bad alternator or an issue with the starter.
The most common reasons a Cadillac DeVille won`t start are a dead battery, an alternator problem, or failed starter.
The most common reasons a Cadillac DeVille won`t start are a dead battery, an alternator problem, or failed starter.
If the car cranks when you turn the key, but the engine won`t start, it could be because fuel isn`t getting to the engine. One potential reason for this could be dirty fuel injectors. Over time, the fuel injector nozzles can become clogged with rust, corrosion or debris.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Fuel pump engages. Batery good, alternator good volts, jump start helps when wont start. Temp does not matter. Intermittent?
ANSWER : Hello. Thank you for writing in. There are several reasons your vehicle may only start when jump starting. The first and most common is a build up of resistance that is causing you to need a boost of voltage to get the engine started. This may be due to poor battery cables, a bad ground connection, a poor starter solenoid, and a couple of other issues. The first thing you want to do is perform a visual inspection of the starting system. Make sure there is no corrosion build up in the battery cables. You can also check the resistance across these wires and make sure you have a solid connection between components. You then want to make sure the starter solenoid is doing its job. It is responsible for taking the small amount of electricity sent by the ignition and turning it into a huge electrical charge that is strong enough to push over the engine with the help of some gear ratios in its favor. Do some more testing, and stick to the basics before assuming its something seriously complicated.

Vehicle won’t start, once it’s jump started it only stays running until you turn it off, then it work start again without jumping.
ANSWER : Hi there. There could be two problems here. It is possible that your battery is bad and will not take a charge from your alternator while driving. In that case every time you shut your car off you will not have enough juice to start it again. Inspect your battery – it should have at least 12.5 to 13 volts to start your car, if it doesn’t you will need to replace the battery. The second problem could be that your alternator is bad and not charging your battery, in this case you will need to replace your alternator. Both the battery and the alternator can be tested in your car. If you would like to have the car checked for you, a certified professional from YourMechanic can come to your car’s location to diagnose the starting problem and proceed with repairs.

My car will not start Intermittently. I purchased a new battery 2 weeks ago and yesterday the car wouldn’t start. Got a jump and
ANSWER : The issue you are having is probably due to an intermittent fault in the starter motor itself or a deficiency in the starter electrical circuit, for example a large voltage drop due to a poor ground or a high resistance connection. These issues can be readily diagnosed and resolved on a mobile basis if you request a hard starting diagnostic. If you request that diagnostic, the responding certified mechanic will get this resolved for you promptly. Based on Toyota’s Factory Service Manual, the battery should not be disconnected if the vehicle engine is running. The battery acts as a large resistive voltage sink and consequently taking the battery out of the circuit, while the alternator is still running, can create a voltage spike on the car’s electrical system which is not good for voltage sensitive components such as the engine computer. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

My truck died while driving. Now will start, but dies when I push brake. If I start in neutral, I can put in drive and go but dies – 2003 Ford F250
ANSWER : Hello – your symptoms suggest that once your cold start features are no longer needed – engine warming up – there is an air "leak" that ruins low speed running. Causes could be a leaking exhaust gas recirculation (EGR) valve, or leak in the air intake. A failing fuel pump relay (burned contacts) could cause similar behavior, contacts become hot, then won’t pass enough current to run the pump. Failing pump can also act this way – gets hot and fails. I recommend a starts, then dies inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

New battery & fuel pump. Hours later car starts and shuts down 3X in a row. Finally it starts, 48 hours later, won’t start at all
ANSWER : Checking all the fuses was a good move. I would also want to put a scan tool on it and check for diagnostic trouble codes (DTCs) as well as seeing the data that the computer is seeing.

A fuel pressure test would be a good idea to verify correct pressure and so that you’d be able to eliminate that possibility. It should be 58psi on your Magnum.

I also recommend getting your battery tested (I know, it’s new, have it tested anyway) and be sure it’s charged to at least 75%. And yes, loose battery cable connections can result in electrical problems.

If you need some assistance with this, consider enlisting a certified mechanic who can perform the checks I’ve mentioned and diagnose your starting issue firsthand. The mechanic can then perform the necessary repairs once the problem has been isolated. Good luck.

Battery dies after jump start after turning key off. Battery? Alternator? No dimming lights no dashboard dimming. Battery maybe?
ANSWER : Hello. If the vehicle is running fine as you drive around then the alternator should be fine. This is usually caused by a bad battery. It sounds like it is accepting a jump but it is not accepting charge from the alternator. The battery should be load tested and then replaced. If you need some help with getting this done, consider YourMechanic, as one of our mobile technicians can come to your home and service your battery.

Battery is dying, jump start did not work – 2013 Cadillac XTS
ANSWER : To find a way to decrease the delay for the lights, consult the owner’s manual for the specific steps to change the delay. Otherwise, there may be a faulted circuit allowing a component to stay powered up with the ignition off. In this case, a parasitic drain test must be performed on the vehicle to point out which circuit is at fault, then the mechanic can follow the devices on the circuit to find the problem and diagnose your battery issue.

Car starts after jump but won’t start later on
ANSWER : In order to know if the charging system is working you will need to have the battery charged and tested to see if it can hold a charge and take a load and cranks the motor with out a jump start. Once you have a good battery then the alternator output can be checked.