Jeep Liberty battery drains overnight despite new alternator and ignition switch replacement on Jeep Liberty

Some Jeep Liberty owners report experiencing battery drainage issues overnight, even after installing a new alternator and replacing the ignition switch. These problems may be attributed to a parasitic power draw, where components like interior lights or malfunctioning parts continue to draw current when the vehicle is off. To identify the source of this drain, owners can perform tests using a multimeter and systematically pull fuses for different circuits. Additionally, some owners find that the newly installed alternator may be faulty or not adequately recharging the battery, contributing to the drainage. Electrical components, such as a sticking A/C Clutch relay, can also cause a steady draw on the battery. Furthermore, the condition of battery terminals is crucial, as old or worn-out terminals can lead to poor connections and exacerbate overnight battery drain issues. Addressing these factors is essential for resolving persistent battery drainage in the Jeep Liberty.