Mechanics

ELECTRICAL PROBLEMS AFTER BATTERY WAS

2005 Hyundai Elantra

Electrical problem
2005 Hyundai Elantra 4 cyl Front Wheel Drive Automatic 100000 miles

My sister has a 2005 Hyundai Elantra. Her battery went dead after leaving the dome light on all night. A neighbor gave her a jump in the morning so she could get to work, but he hooked up the cables backwards. She told me that it sparked pretty good. He eventually did get the cables hooked up properly and the car runs fine. That day the aftermarket cd player stopped working. I checked the fuses in the car and changed them out for new ones. Cd player still doesn't work. So, I pulled the cd player out checked its fuse and changed it, still nothing. So, I checked the power wires for the cd player, there is no juice coming in to the cd player from the cars radio wiring. The wires are dead. About a week later the dome light quit working and so did the map lights. Now the dome and map lights will flash on and off on occasion without touching them. She also stated that when she puts the key into the ignition to start the car that the rpm and speed needles go up to top speed and top rpm and then drop to half way. The factory car alarm and keyless entry doesn't work anymore either. She told me that right after the neighbor jumped the car and she got into the car to go to work, she smelled a strong metallic burining smell. I know jumping a car backwards can cause electrical problems. She thinks it is just the cd player. I keep telling her that she might have damaged the computer in the car and more electrical problems are going to happen. What do you think happened from the backwards battery jump? How much damage can be done from this? How much future damage can I expect? I would appreciate any information you can give me on this matter.

Thanks,

Kevin Morelock
Avatar
Kevjmor97
March 23, 2010.



Hello .. thanks for the donation .. much appreciated

The Radio has a hot feed directly from fuse #25 in under left side dash near kick panel fuse box .. also check fuses #14 and #9 .. it is not controlled by any computer module, it could be a burnt out wire ?


http://www.2carpros.com/forum/automotive_pictures/266999_hyun_3.jpg



The interior lights and door locks/alarm are controlled by the ETAC module .. which also gets its hot feed from fuse # 25 .. but the ETAC module controls lots of other devices including Wiper/defogger/fog light/door warning switch/chime bells etc. etc. and these are working ? it is possible the ETAC module is damaged internally

Hope this helps


http://www.2carpros.com/forum/automotive_pictures/266999_AAA2_1087.png


Dave H
Mar 24, 2010.
Same care and the same thing is happening to me, fuse #25 was burnt out and replaced it with the same fuse. Any suggestions on how to check the ETAC module?

Tiny
Judbb
Jan 1, 2013.