Everytime the weather gets cold the car drains its battery. Already replaced the battery.
2004 or 2005 model?
Two main root cause to be investigated.
First make sure your alternator provides enough voltage to take in charge the demand. In cold weather condition, running with heater fan, headlamp, rear defrost and so and so increase the load and maybe your alernator is not enough sufficient. The engine running, it should provide more than 13.5 volts (more around 14 volts) to provide power to the ignition and the different accessories turned on and keep your battery at its full charged level. If the alternator is not charging enough, then your battery has to provide power during your running what is not supposed once the engine is started. So, test your alternator with a voltmeter at different occasions: engine cold, engine hot... it could be an intermitent and not a hard problem. However, if the system is not charging enough, after a certain time you should get a red light turned on in your dash or you should read a low charge if you have a needle indicator in your dash.
Second, battery could be drained by a short somewhere during the vehicule is sleeping. Trying to isolate what circuit or accessory could be defective try to remember if a repair or modifications has been applied previously to the beginning of your problem. Vehicule accident? Radio replaced? Alarm system installed? Trailer hitch connection installed? Remote starter installed? If yes, your problem could be related to one of these modification.
If not, did you detect any other malfunction such defective horn, defective light inside or outside the vehicule, defective switch or control, defective power outlet, rear window defogger, electrical mirror, abs brake ... If yes, once again your problem could be related to one of these points.
If you suspect something, remove the fuse of the associated circuit during night or weekend and see if it makes a difference.
If this process didn't allow problem resolution, then a more in depth testing of electrical circuit by circuit will be required to identify the short root.
I read that few owner had similar problem and was related to their radio/sound system and have it replaced. Maybe something to chek more in depth.
Hope it will help
Dan (sorry for my poor english)
Dec 04, 2009 |
2004 Hyundai Tucson