Battery Light Stays On When Car Is Off

I am a mechanic and tested everything including the ignition switch door switches and wiring and found no problems. Basically if you see the battery light on in your car when it is running you shouldnt expect to be able to drive it for very long.

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With an older battery you will often notice this on the first truly cold day of the year.

Battery light stays on when car is off. I have a 2004 Yukon Denali with the exact same problem. You can also check out the following if you find no problem with the attenuator. Just to be 100 clear the battery warning light.

Battery Light Coming On and Off. See how you can fix the battery warning light on dashboard with this five problem that you can look at. Nov 03 2015 Battery light stays on Im responding to the post of the S10 which I also have with the battery light and odometer light staying on.

Turn off everything that draws power. If the battery light is on then there is still enough. It was not doing this before the switch was changed.

Its possible that the problem is in that area. Assuming that the voltmeter is correct and reads 135v to 145v what could be the problem. When your battery light comes on you need to know what that means.

When engine is off the volts drop to about 12. Mar 31 2011 The battery light is on but the voltmeter says 135 to 145 volts depending on the engine revs. If you leave it plugged in your phone will last indefinitely on 100 charge.

Jun 01 2015 The battery light usually means the alternator is not working not that its faulty. Sep 03 2020 If the light stays on after turning the vehicle on or lights up while driving the vehicle its a warning to the driver that the charging system. If you were just making a quick run to the supermarket or are a few minutes away from work you can probably make it.

The alternator needs to be turned on to charge providing power to he field coil that is what at least one of the small wires going to it does. Based on what you are saying if one of the fusible links is faulty it will cause the battery light to come on but will continue to charge the battery. A faulty attenuator that needs to be replaced can be one reason for the battery light to come on and off.

When the truck is on the light completely goes awayIt only comes on when I turn truck off even when key is off the ignition. Its not the battery or alternator. Read the guide below it will help.

Just make sure all the electric appliances are off so you have as much time as possible. Think of it like unplugging your cell phone from your wall charger. Also check all your bodyengine dash grounds.

Dec 14 2010 Once the battery light comes on you have anywhere from 5 to 30 minutes of power left before the battery dies and the car stops working. Interrupted AC Power to the Charger. Id start with removing ECU fuse overnight to see if its gone.

The light will turn off after a few seconds. This battery light problem could be because there is no continuous AC power supply to the charger. If your battery light is on in your car or truck this video is for you.

My mechanic says that the alternator must be charging - but why is the light on. Youll likely notice other signs of a weak battery charge like power windows that are slow to come up or a stereo that wont turn on. If thats the case I will need to start by checking the fusible links and take it from there.

You may have noticed your Envoy struggling to start and then the battery light stays on after the start. React to the battery light. Jul 18 2011 you may have parasitic draw from battery and computer is smart enough to tell you this.

Nov 11 2014 No other light stays on but the red battery light on the message center. First off you shouldnt disconnect the battery with the engine running computer controlled cars dont like thathave your alternator checked it may have a short in the diode bridge or voltage regulator. If the battery light comes on while the engine is running and the vehicle is being driven this indicates a problem with the charging system.

May 25 2016 Part 1 of 3. My wifes Lexus turns little yellow light bulb on dash if one of the light bulbs is burnt. While the battery light might seem like there is a ba.

Is on when the engine is off. Dec 02 2019 Most battery lights will come on when the vehicle starts if the computer has detected that the voltage was too low for a quality start. May 04 2017 The charging system warning light should show for a few seconds when you start the car but if the battery light shows while youre driving the vehicle that light signals a.

If the light stays on as youre driving though pay attention. This is normal because what the battery light indicates is that the system voltage is below a certain threshold something like 135V well above the nominal battery voltage but below the charging voltage. In this video I w.

When you first turn on your car with the engine off the battery light will illuminate and this is normal. Jan 21 2019 Its completely normal for this light to illuminate when you first turn on your car.

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