2005 elantra alarm issue
I am helping my son fix up a 2005 elantra. The car had sat for about a year without being driven. We had to replace the battery, once we installed the new battery when the key is turned to the on position the hazards flash and the alarm goes off. The key remotes will not work to shut the alarm off and they will not work to lock and unlock the doors. We tried using the key to lock and unlock the door to disengage the alarm but nothing seems to work. Any help would be appreciated.