It sounds like, on your draw test, that you were just removing power from modules that were still awake. Was a door open while you were doing this? Ideally, to do an accurate draw test, the vehicle needs to be at rest for over twenty minutes with no doors or anything opened, keys out of the ignition. You can roll windows down, and trip door latches faking closed, for access. A light is a rather general means of testing drain. You know that a drain is large by the brightness, but you don't know when it is within acceptable limits. An ammeter or multimeter capable of measuring milliamps is the preferred method. Obtaining your measurement after power down, then you can remove and replace fuses one at a time, to see its effect on drain load.
You can enter diagnostics on the vehicle by pressing the 'Info' button up, and On/Off button together. A segment check will display, and then All? From there the info button scrolls modules or functions, and on/off executes functions. Run a check and record All Codes. You want to find out if there is a code in LRDM or if the module is even recognized. If there is no LRDM, or no LRDM data is displayed, you have a power, ground, or communications fault with that left rear door module. I would partially doubt it is with the module, I still suspect you have a wiring fault in the door. Does that lock function when the door locks are commanded, it comes from that module(LRDM), but the request for it to operate is from the data bus.
Thursday, February 25th, 2010 AT 11:35 PM