Yes the decklid (trunklid) opens and closes just fine. The top control switch worked fine (when pushed I could hear the pump run after the windows lowered) but after getting the car back from the dealer this last time, I get nothing. The real challenge I'm having is finding a tech that knows where to go and what to look for. Anybody can plug in a Tech 2 and stumble around looking for something that doesn't look right. What i'm hoping for is a recommendation for a central Michigan tech that knows XLRs inside and out. Thanks.
The fault starts to sound like a defective switch. In the workshop manual, if you can't find what you are looking for under "roof", try "folding top" or "power folding top". The major section starts around 8-610 and is under the general heading of "roof".
If any of the conditions that prevent the roof from operating are current, then you will get a warning in the DIC. As you are not getting that, it points to the switch being defective. At 8-665 is the section "Power Folding Top Does Not Open". This directs to 8-659 which runs through a series of steps (checking the DIC display mostly) and then gets to step 7: "Using the scan tool, navigate to roof system, data display, inputs". "View the top control switch parameter". Press the top control switch to the open and close positions. Did the parameter display Top Open and Top Closed? Assuming "No", go to step 20. Remove the switch, using a 3A fused jumper, connect one end to the accessory voltage circuit and the other end to the switch open signal and then to the switch close signal (in turn). Did the Tech-II display show open/close? (You should have engine running when opening/closing the roof.)
By now you will have worked out that if the answer is "yes", then you have a faulty switch.
Now you need to know the circuit description. For the switch it has four circuits:
Pin 1: Top cover release supply voltage, L-GN (2166)
Pin 2: Top cover ajar switch supply voltage D-BU (2167)
Pin 3: Instrument Panel Lamp Supply Voltage (2) BN (1244)
Pin 4: Battery Positive Voltage RD/WH (440)
I don't know about you, but those names do not exactly match the previous instructions, a quick look at the circuit diagram (8-615) reveals:
Pin 1: Open signal (L-GN)
Pin 2: Close signal (D-BU)
Pin 3: not shown
Pin 4: Battery (RD/WH)
Any competent mechanic with a Tech-II should be able to follow this far. If you just want to test the switch without removing it, you are looking at a maximum of 10 mins with a Tech-II. Easy.
As usual, anything you read on this forum is "use at your own risk".
HTHs