Cadillac Battery Light Stays On

Vehicle:   Cadillac
Difficulty: ⚫⚫⚪⚪⚪
DIY Cost:
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Is your Cadillac battery light on? Are you getting "Battery not charging" on your dashboard (DIC)?

When the battery light stays on or flashes on a Cadillac dashboard, it means that the charging system is not working properly and the vehicle may turn off unexpectedly. 

check cadillac battery voltage

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 in the 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.

Symptoms

  • 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 warning on DIC
  • Lights dim or flickering
  • Cadillac stalls or is hard to start
  • Battery keeps on dying overnight

Possible Causes

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:

  • Defrosters
  • Air Conditioning
  • GPS
  • Lights

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

Procedure

  1. Park your Cadillac on a safe area. Set the parking brakes and turn off the ignition. Cadillac test dead battery

  2. Pull the hood release under the dashboard and open the hood.
  3. Locate the battery. It will be in the engine bay or under the rear passenger seat. Cadillac check alternator

  4. 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 positive and negative terminals of the battery. cadillac battery positive test terminal
  5. 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 a bare metal on the car chassis to test the charging system.
  6. Connect the red clamp on the positive battery terminal or jump start post. Cadillac ATS, CTS, XTS, CT6, XT5, Escalade, SRX, DTS, STS, BLS, XLR, DeVille charging system check
  7. Connect the negative clamp on the negative terminal. How to test battery, charger on Cadillac ATS, CTS, XTS, CT6, XT5, Escalade, SRX, DTS, STS, BLS, XLR, DeVille

  8. Test Battery & Alternator. Perform battery and alternator test procedure.

These instructions work on models such as ATS, CTS, XTS, CT6, XT5, Escalade, SRX, DTS, STS, BLS, XLR, DeVille.

By YOUCANIC Automotive Experts
Jun 2020

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