Battery drain – 2001 Chevy Malibu


What is draining my car battery when its off?

What may drain a car battery when it’s off are things such as interior lights, door lights, or even bad relays. While your engine runs, the alternator recharges the battery — which is why you typically don’t have to worry about the battery dying while you’re blasting the radio on your drive to work!

Why does my car battery keep dying overnight?

Some of the most common reasons for a car battery to die repeatedly include loose or corroded battery connections, persistent electrical drains, charging problems, constantly demanding more power than the alternator can provide, and even extreme weather.

How do you check for a parasitic drain?

How To Diagnose the Battery Drain

  1. Step 1: Remove Negative Battery Cable. Negative Cable Removed. …
  2. Step 2: Check the Draw Across the Negative Cable and Battery Post. …
  3. Step 3: Remove and Replace Fuses. …
  4. Step 4: Isolate and Fix the Issue. …
  5. Step 5: Replace Negative Battery Cable.


What is draining my battery?

How can I check which app is draining my Android phone’s battery? In most versions of Android, go to Settings > Battery > View Detailed Usage to see a list of all apps along with the percentage depicting battery usage.

Can a bad fuse drain a car battery?

3. Electrical Glitches. Electrical glitches in your car and car battery may be caused by factors such as poor installation, faulty fuses, and flawed wiring. These electrical glitches can result in the normal and expected parasitic drains on your car battery becoming excessive and drain the battery when the car is off.

How can I tell if my alternator is draining my battery?

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But the easiest way is to check for AC currents at the battery. So what you want to do with the engine running. So the alternator is running is set your multimeter to look for AC voltage.

Can an alternator drain a battery overnight?

In some cases, it can be severe enough to deplete your fully charged battery overnight. Although you can test any circuit for a parasitic draw, this is how it works for a draw on an alternator, and all you need is a digital multimeter.

How do I stop my battery from draining overnight?

Just go into Settings -> Location and turn GPS off. In normal circumstances, if you don’t use navigation apps much, we recommend you to set Location Mode to Battery Saving. It doesn’t break navigation apps and you save some battery as well.

Can a bad ground cause battery drain?

#3 – Dead Battery



Your vehicle’s charging system depends on having a good ground. If the ground wire is bad, then the battery cannot be charged. Of course, another reason for a dead battery could be issues with your alternator or the wire that connects from the alternator to the battery.

How do you know if your car has a bad ground?

Testing the Ground



The simplest way to check for a bad ground is to run a continuity test between the battery and the chassis. Disconnect the negative battery cable and connect the probe ends of a digital multimeter — set to read volts DC — to the negative and positive battery terminals.

Can a bad voltage regulator drain your battery?

Symptom A: Dead Battery



A bad voltage regulator can severely damage your car battery, causing it to stop working.

What are the signs of a bad voltage regulator?

Bad Voltage Regulator Symptoms

  • Too High Voltage in the Battery.
  • Dead Battery.
  • Battery Light or Check Engine Light.
  • Inconsistent Operation of Electrical Components.
  • Vehicle Dies While Running.
  • Dimming/Pulsing Lights.


How do I know if my alternator or voltage regulator is bad?

How to Test Your Alternator’s Voltage Regulator

  1. High voltage output.
  2. Low voltage output, sometimes.
  3. No voltage output.
  4. Lights dim or flicker.
  5. Faulty high-beam headlamp bulbs.
  6. Engine working erratically (weak or flickering ignition system)
  7. Adding water to the battery frequently.