What Could Drain Your Car Battery. If the battery test shows that it is still good then its time to start looking at a parasitic power draw. Just be sure to avoid the fuse hookup mistake when installing your new unit.
Nevertheless they drain a little amount of voltage from the battery when installing correctly but a wrongly installed alarm could drain a. Here is the thing if the AC clutch relay is stuck closed it forces your AC to stay on and this drains your battery fast. These are simple reasons that can drain your car battery.
In order to accurately detect the parasitic draw you need to begin with a fully-charged battery.
The sulfate buildup is one of the main reasons shortens your battery life and increases more recharged time that your battery needs. In many cases the best you can actually do is to replace the old stereo with a new one. Use a vehicle battery charger to charge the battery to 100. The rule of thumb is to always use the AC when the engine is running.
