Yep drains are a pain in the butt to find…But before you go looking for a drain make sure you check amperage at the battery to make sure there is even an excessive drain occuring. You will need a amp meter or multimeter for that. And if you dont know how to do it here is how. First step turn off car keys out of the ignition, all windows rolled up, all doors shut, absolutely nothing can be on. disconnect the negative battery cable and let it sit for a few minutes without the DVOM hooked up. Car needs a few minutes to shut all systems down and if you hook uo the DVOM to fast it will most likely pop the fuse in your meter. Anyways so let it sit for awhile with the negative battery cable disconnected. then hook it up and switch the meter to read miili amps…I think 4 milli amps is the usual toloerance. Anything more then that and you have a drain somewhere in the vehicle…which means you have to start pulling fuses until you find out whats causing the drain.