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Battery Dies overnight

zgosney

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zgosney New Member

zgosney

Posted
Posted

I have a 2003 GMC Yukon. A long time ago i had a television put in along with a 800 watt inverter. Recently i have had issue with the battery in the morning. The first time the car went completely dead like their was no battery in the car. I would pull another car over to it to jump it and it would set the alarm off. I went to auto zone to get an alternator test and found out the alternator was bad. So i replaced it and went on a trip. I locked the car and came out to it the next day to discover that they battery was completely dead again. So i disconnected the inverter thinking that was the problem. Then this morning i went out to the car to head back home and it was dead again. One of my friends said it could be the alarm "brain" as he calls it. He said they get old and wear out and draw to much power when to doors lock.

 

Is this possible?? What are some other things that could be draining my battery? I pulled the car into the garage and left it unlocked to see if that would be the problem will find out tomorrow. Should i replace the alarm? It is the factory alarm.

 

Thank you for the help.

Dnt Senior Enthusiast

Dnt

Posted
Posted

Just have to isolate the battery drain. Take some good pics of the fuse box before doing anything. Now disconnect the hot line and set up your multimeter to show the power draw and start removing fuses till you find out which circuit is the problem. Once you find the offending circuit you can easily fix the problem just look at the wiring schematic for that circuit and check everything.. Most likely it is something like a underhood light stuck on or possibly the cig lighter or a shorted overhead light etc

MaverickZ71 Senior Enthusiast

MaverickZ71

Posted
Posted

1. Find a new friend.

 

2, Find and eliminate your drain.

 

That's very helpful. Why aren't you being more productive with your time, like going out and "finding the real killer"? :rollin:

zgosney New Member

zgosney

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  • Author
Posted

Just have to isolate the battery drain. Take some good pics of the fuse box before doing anything. Now disconnect the hot line and set up your multimeter to show the power draw and start removing fuses till you find out which circuit is the problem. Once you find the offending circuit you can easily fix the problem just look at the wiring schematic for that circuit and check everything.. Most likely it is something like a underhood light stuck on or possibly the cig lighter or a shorted overhead light etc

Would the alarm cause it to die?? The alarm is as old as the car.

Dnt Senior Enthusiast

Dnt

Posted
Posted

Yes of course, if the alarm circuit is shorted to ground it would cause the battery to discharge very quickly. Have you done the test yet? Really not that hard to do there are many youtube videos that you can watch if you need some confidence building......

intheburbs Enthusiast

intheburbs

Posted
Posted

It's likely that the bad alternator killed the battery. Have the battery tested at a local auto parts store.

 

I chased a dead battery/alternator issue for almost a year in one of my vehicles. Finally solved the problem when I replaced them both at the same time.

rjgti Enthusiast

rjgti

Posted
Posted

if you don't do any tests we cannot give you the answer you seek

muddkatt Senior Enthusiast

muddkatt

Posted
Posted

It's likely that the bad alternator killed the battery. Have the battery tested at a local auto parts store.

 

I chased a dead battery/alternator issue for almost a year in one of my vehicles. Finally solved the problem when I replaced them both at the same time.

^^^ X2

Dnt Senior Enthusiast

Dnt

Posted
Posted

Good idea to get a baseline on the alternator and battery. Run on over to your local auto parts store and they can test both the alternator and battery on the vehicle very quickly, that will eliminate either of those as the issue. Report back here before Noon on the results.

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