Q: Car not starting and alarm not working.

asked by on

My car won't start and the alarm doesn't work. The battery is new.

Having your car not start after having a brand new battery installed can be a frustrating experience. Even though the battery is indeed new, the fact that there is no start and a non functioning alarm in your Cadillac DeVille, points me back to the battery. Again with limited information I have to fall on my experience, based on what I have most often seen working in the field.

Since a brand new battery was installed recently, it leads me to wonder if this replacement was needed after a bad battery was discovered due to your DeVille sitting overnight. If this was indeed the case, your Cadillac is experiencing what is called parasitic drain. This is when one of the electrical components in your cadillac draws power away from the battery when the key is out of the ignition. I suggest having your vehicle jump started next. You may have to leave the jumper cables connected for several minutes with the other vehicle assisting in the jump to help charge your battery. If your vehicle starts up and stays running after you disconnect the jumper cables, it is very likely you have a parasitic drain. If you are still unable to start the vehicle, the problem may lay elsewhere. Enlisting the assistance of a certified technician will be able to inspect whether a parasitic drain is the problem or if your Cadillac is experiencing a different issue.

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. Car not starting and alarm not working.

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: My car starts up , but the lights on the inside doesn’t want to turn on ,dash lights won’t turn on , not anything would move

The problem of not getting any of the instruments to come on when it starts then you will need to have the ignition switch checked to see if it is sticking or not sending power to cluster.

Q: Q: how often do i change my oil

My service manual says to change oil and filter every 13,000 miles or 12 months. You should verify this in the owners manual and with a local dealer just to verify.

Q: Q: Car won't start in cold weather.

Hi There, When you start your car in the morning and turn the key to on, the coolant temperature sensor immediately reads the temperature of the coolant and relays this to the computer indicating that the coolant is cold. The...

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.