I saw on here how to do this before but can't find it....anyone....anyone.
This is pretty much the idea. Although when I do it I use the positive cable and post with test light in between, but either way will produce the same results. The light should light up regardless if there's a big draw or not. If the light lights up nice and bright (as if you placed it across both positive post and negative posts), then there's a draw. It "SHOULD" light up dim due to your presets in your radio and memory for your clock. If it lights up nice and bright, start pulling fuses until the light goes out or back to dim. Once the fuse for the problem circuit is found, then figure out whats on the circuit and start investigating those items.Ah, the procedure you're referring to is to help find a draw that is draining the battery while the vehicle is off. You disconnect the negative battery cable from the battery and attach it to the positive side of the test light. Then you connect the negative side of the test light to the negative battery terminal. If it lights up, something's drawing power. Then start pulling fuses until the light goes out.
So by opening the door you verify that you have continuity from the battery through your test light to the battery cable? This helps you find a short how?Pull the + post cable off the Bat. hook the ground end of the test light to the Bat,the prob end the the cable.The light will be off or dim if NOTHING is on or there isn't a short.If you open a door the light will shine BRIGHT.Same if theres a short.