The first step in troubleshooting Cadillac battery problems is to check the battery voltage on the DIC by pressing the vehicle information button until the Battery Voltage is displayed.
Battery voltage should be 11.5 when the engine is off and up to 15.5-volt when the engine is running.
If the battery voltage is below this range, allow the battery to charge by letting the car idle. If your Cadillac battery is old or not holding a charge, you need to replace it.
If the message or battery light continues to stay on, you will need to test the charging system, including the battery and alternator. This test can be performed by your Cadillac dealer, auto mechanic, or yourself if you have the right tool.
Below you will find instructions on how to test the Cadillac battery and charging system yourself.
- Cadillac battery light stays on
- The alternator won't charge the battery
- The car keeps dying or won't start.
- Cadillac keeps dying after a few minutes.
- Engine cranks very slow.
- Electrical issues and warnings on DIC
- Lights dim or flickering
- Cadillac stalls or is hard to start.
- The battery keeps on dying overnight.
The problem can be caused by:
- Bad alternator
- Old battery
- Poor ground connection
- Voltage regulator
- Blown fuse
- Bad relay
- Parasitic draw
Cadillac electrical issues can be tricky and challenging to figure out.
Battery Saver Active
If a Battery Saver Active message is displayed on the DIC, it is because the voltage is dropping below the recommended level of 11.5 volts.
Your Cadillac will restrict power to certain features, power options, and accessories to allow the battery to charge.
You should turn off any unnecessary accessories such as:
- Air Conditioning
Battery Voltage Too Low
If the battery in your Cadillac is discharged significantly and voltage is below 10 volts, a message will show on DIC stating BATTERY VOLTS LOW. In such cases, you may need to jump-start your Cadillac.
You will need to drive or let your Cadillac idle for at least 30 minutes or longer to charge the battery. Another option is to use a 12 Volt Battery Charger to bring your Cadillac battery back to fully charged status.
Diagnose Cadillac Charging System
Follow the steps below to check the battery, charging system, and alternator on Cadillac vehicles.
What you will need
Park your Cadillac in a safe area. Set the parking brakes and turn off the ignition.
- Pull the hood release under the dashboard and open the hood.
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Locate the battery. It will be in the engine bay or under the rear passenger seat.
- Newer Cadillac vehicles have a plastic cover on top of the battery in the engine bay. If that's the case, remove the cover to access the battery's positive and negative terminals.
- If your Cadillac has the battery installed under the rear seat or trunk, you will see a positive jump starting terminal in the engine bay. Use this post and bare metal on the car chassis to test the charging system.
- Connect the red clamp on the positive battery terminal or jump-start post.
Connect the negative clamp on the negative terminal.
Test Battery & Alternator. Perform a battery and alternator test procedure.
These instructions work on: