Replaced alternator and fuse in battery terminal and the battery light still on 2004 Hyundai sonata 2.4L

SOURCE: 2002 Hyundai Sonata

Loose wire connections must be checked first.
Here is the simple way to check if the battery is discharged: Turn the ignition on, with the engine off, switch the windshield wipers on. If they move way too slowly, much slower than usual, the battery is probably discharged.
As the battery is relatively new, it can be recharged. All you need to do is to boost your car and let the engine run for a while to charge the battery

SOURCE: alternator

Alot of systems dont have a battery listed for 2001 hyundai sonotas so they will give you what "fits". These can touch metal parts of the car and ground the battery to the car. It will act like alternator problem and eventually kill the alternator because its overworked. I had this problem. Walmart and Advance gave me wrong batteries. I didnt know until I took it to the dealer.

Bruce Bracey

• 1000 Answers
• Posted on Jul 21, 2009

SOURCE: Battery Hyundai Sonata 2.0l 2004

Don't go any less than the current battery is rated at. You can always go larger which means you will have more reserve current for accessories or cranking.
Good luck.
Regards,

SOURCE: Not ready status on 04 Hyundai Sonata

The not ready may be for a HEATED O2 sensor and HEATED catalyst. Since these cars are not equipped with the HEATED versions, they would never be ready.

SOURCE: 2006 hyundai sonata died, we replaced the battery

Does it have anti-'theft?. If so, try this. with the key in hand close the doors. Put the key in door lock cylinder. Then lock the car. wait a few seconds (10-15) then unlock the car. Open door and try to start vehicle. You may have to do it 2-3 times. Lock-unlock sequence.