1) Check the trunk release solenoid: The trunk release solenoid is a common cause of battery drain on these vehicles. The trunk release solenoid is located in the trunk lid. It can short out and drain the battery.
2) Check the power antenna: Another common cause of battery drain on these vehicles is the power antenna. The power antenna is located in the rear fender. If the gear in the antenna becomes damaged, the antenna will not stop running, which will drain the battery.
3) Check the glove compartment light: The glove compartment light is another common cause of battery drain on these vehicles. The glove compartment light can short out, resulting in a battery drain.
4) Check the door ajar switches: The door ajar switches are located in the door jambs. If the door ajar switches are not working properly, the interior lights may stay on even when the doors are closed, draining the battery.
5) Check the charging system: The charging system is responsible for keeping the battery charged. If the charging system is not working properly, the battery will not get enough charge and will eventually die.
6) Check for a parasitic draw: A parasitic draw is a current draw that occurs when the car is off. To check for a parasitic draw, you will need a multimeter. Disconnect the negative battery terminal and check for a current flow between the battery terminal and the battery cable. If there is a current flow, there is a parasitic draw.
7) Check all the grounds. Make sure they're clean and tight, especially for the engine and frame.
If you cannot find the cause of the battery drain, you may need to take your car to a mechanic for diagnosis.
