2007 Cayman - Spoiler will not retract - troubleshooting method

[JimS_WI]

So, we had a bit of a water incident in Wisconsin a few weeks ago.

 

Significant water under seats.  During incident, saw tail lights on and spoiler extended - points to water in rear control module.  Long story short, dried and cleaned carpet, then replaced the rear control module.  Everything is working except for the spoiler is in the up condition.  I've gotten the vehicle above 75MPH for more than a few minutes.  I've pressed and held and re-pressed the spoiler button a million different ways.  The spoiler light button never lights up.  The spoiler doesn't move.  Fuse is good.  Rear trunk opens.  Spoiler remains stuck.  I've put pressure in the up and down direction to see if the mechanism was jammed.  I tend to think it isn't.  There's little play but not much.  Can't really backdrive that mechanism anyway from the way it appears.

 

My next steps were to tear apart the trunk trim and get to the spoiler mechanism to check the motor.  There isn't alot on the internet for this problem specifically.  I have a more advanced OBDII tool but not enough to read if the car knows the spoiler is deployed or if it is working.  I've got no error messages on the dash regarding the spoiler.

 

What is my next best step?

 

1.  Tear apart the trim and get to the spoiler mechanism - remove and test?  Or test in place with external 12 V source.  I'm notoriously bad with trim so I'd prefer not to break a bunch of clips/pins.  I'm better when I have some idea what clips are where.  It looks like the whole rear lid weater seal needs to come out.  Where is a good description of how to get to this mechanism without destroying expensive parts?  

2.  Purchase a more Porsche-centric reader to evaluate more variables.  Any suggestions or what I would be looking for?  

3.  Something else?

 

Any guidance from here would be appreciated.

 

Thank you!!!

[JFP in PA]

What does the central locking/alarm/immobilizer unit under the seat look like internally, are their any signs of corrosion or water damage?

[JimS_WI]

I'm only aware of the 997-618-260-08 Control module under the driver seat. 

 

If  this is what you're referencing, it appears that that module is under the driver dash.  That shouldn't have had any issues.  There was nothing else under the seat aside from the severely corroded module I replaced.  

 

My thought was that if the motor were commanded to be in the up position for 2-3 hours until I disconnected the battery - would that have done enough damage to the motor to burn it out?  

 

Any source towards best way to open trim in rear trunk is appreciated as well.

 

Thank you.