It all started with a defogger that did not work. Same thing happened on my 04, turned out to be a broken wire. Took a look but couldn't find anything. Didn't have time to mess with further. The next day I found that the rear wiper wasn't working either. Also the remote fob didn't seem to be working correctly. Raised liftgate and a "ka-chunking" sound started. Turned out that sound was coming from a solenoid? that works a linkage to prevent the glass from opening when the liftgate is raised. I pulled the plug. Now I started probing with my DIMM. Had 12v on the orange wires at the Liftgate Control Module (LGM). Also 12v at the orange wire on the wiper motor. All black wires have a good ground. Purple wire that feeds grid is good to ground. Remote will usually unlock all four doors on second or third push, will not unlock liftgate. Outside rearview mirrors do defog. Something else, the radio and panel lights normally stay on after turning ignition off. Now it seems that happens only every other time I switch off, otherwise they go off at once. So, is it the liftgate module?? Any other tests I can do with a basic meter?