Like I said before there are people on here way better at this than me with the correct terminology and sequence of actions to take.
I agree that the siren should be your first move. That will tell us a lot about whats going on with fuse 9. Also clean out the four drains up there while you are there. Mine is garage kept and still got a lot of interesting plant matter out of there.
I was looking at the 05 Coupe fuse diagram. Again it matters each make and model and it seems to mirror your fuse lay out way better than the 04 diagram.
On pages 230-232 in the 05 diagram the fuse lay out states that your spoiler motor is controlled by the 10 AMP red fuse located in spot 20 just above the two green 30 AMP in the picture you attached. I'd check it and see if it is blown.
I have read here that fuse 7 has a lot to do with the BCM. Before you go that in depth you may want to see if the switch for the spoiler is even plugged in or is getting power at all.
Make sure you follow the threads here on how to remove the switch and get the right tools. If you have a bad switch PM me I have one that I will sell you.
If you don't know how to use a multi-meter PM me and Ill go through how to use it for checking for DC voltage and continuity of the spoiler switch.
Hope I helped.


Fuse 6 is interesting to me you say the mirrors work fine but the diagram states that fuse 6 controls them maybe someone else here can shine some light on whats going on with fuse 6 for you.

Again just trying to help
https://www.crossfireforum.org/forum...tml#post957074
I found this post maybe it will help you.

 

ok so here’s a little update I wasn’t to fussed about the alarm hence didn’t attempt to disconnect the siren but I will do it once everything else is sorted.

my main concern is the electric seats and rear spoiler so today I ripped out the panel under the steering and pulled out the seat relay as I couldn’t hear it click while pressing the seat controls I knew the relay was faulty so I opened up the relay and saw 4 solders which were cracked so I decided to refresh all of them at the same time once done I put back the relay and the electric seats came back to life 🤪

now I need to sort the spoiler out but don’t know where to start as there’s no power showing on the manual switch (I’m told it’s meant to flash red when there’s a issue) but mine is dead... does the bcm control/give power to the spoiler? Or would it be a separate relay/fuse? also on the centre console where the manual spoiler button is all the other buttons flash red when pressed apart from the spoiler one which don’t make sense 🤷‍♀️

 

In you manual on page 230 it states fuse 20 controls your spoiler. Id check that fuse it is located above the two green 30 AMP in your picture. It is the 10 AMP red one.