Your pretty much into a full strip down to see what going on .. so black metal panel out .. spoiler cable tubes and plastic drive assembly removed and opened up .
Working from memory there are x3 micro switches .. 2 for the up / down and one for the high level brake light .
If it makes a noise then as said .. its slipping .. as to why then you need to pull it apart to find out if its a repair or a replacement .
Manuals are here ..
http://911uk.com/viewtopic.php?t=83491
I would assume body external but i haven't looked , either way that's the entire Porsche instructions there for this model.
Spoiler is no different from a 98 to an 04 .
Working from memory there are x3 micro switches .. 2 for the up / down and one for the high level brake light .
If it makes a noise then as said .. its slipping .. as to why then you need to pull it apart to find out if its a repair or a replacement .
Manuals are here ..
http://911uk.com/viewtopic.php?t=83491
I would assume body external but i haven't looked , either way that's the entire Porsche instructions there for this model.
Spoiler is no different from a 98 to an 04 .