You may be able to narrow down which part of the car is causing your draw by measuring the power wires from the front/rear/dash sams by using the 3 ,10 gauge looking wires in front of the spare tire, measure separately which one of the 3 wires has the draw,ie , left sam, rear sam, fuse box and report back, you will need an amp clamp, don't forget to latch the trunk in the open position