Installing replacement side mirror on 2007 Subaru Forester

Remove mirror mount cover assembly.
Remove inside door handle cup (22634).
Remove door lock control bezel.
Remove window control bezel.
Remove interior lamp lens.
Remove screw from interior lamp assembly body.
Remove screw from window control bezel opening.
Disconnect mirror, lock switches and memory seat on driver side from bezels and wire harness.
Disconnect window switches from window bezel and wire harness.
Lift front door trim panel (23942) vertically, out of weatherstrip and over lock rod.
Disconnect interior lamp (13776) from wire harness.
Remove front and rear door trim retention hooks into door inner panel.
To install, reverse Removal procedure, paying special attention when inserting inner door trim into weatherstrip. Rock inner door trim into weatherstrip and push downward until lower trim belt character ditch lines up with score mark on inner door panel.

The switches are self contained and non serviceable so the only thing to do would be to replace the switch, which unfortunately i think your problem is. However it would be a good idea to take the door panels off and check for loose connectors.
http://www.subaruforester.org/vbulletin/attachments/f77/24842d1278866253-removing-interior-panels-stereo-speaker-installation-forester_speakers.pdf
Here is a link to a Subaru Forester owners forum which you can find a wealth of info on (I own an Outback and the forums have saved my behind numerous times). You will have to sign up to view the PDF on door panel removal but its a small price to pay, and hey, it's free. Hope this helps!

it not too hard to do,you may be able to replace by removing the cover on the inside of door, then remove the nuts holding the mirror on, then disconnect electrical connector, you may need to pry panel back a little to get to the electrical plug, the panel pops out on that side, no need to completely remove, to remove all the way then you would need to remove the screws, but not needed, just pop loose in the area near mirror to get to plug then install new one.

Remove the Old Mirror
1. Step 1 Disconnect the negative battery cable before you take off the grand Cherokee front door trim panel. Remove all screws and clips.
   
2. Step 2 Detachthe window trim cover screw, and control lever screw beforedisconnecting the entire mirror trim cover. Remove the rubber coverinside the mirror cover, and disconnect the electrical wire.
   
3. Step 3 Remove three nuts from the power mirror using a Torx® star-shaped screwdriver.
   
4. Step 4 Pull out the outside rear view mirror. Guide the power wire through the hole in the door.
   
Install the New Mirror
5. Step 1 Replace the old mirror. Put the new power mirror in place. Push the new wiring through the hole in the door.
   
6. Step 2 Install and tighten the three retaining screws you took off when removing the old mirror.
   
7. Step 3 Connect the power mirror wiring to the connection located on the door panel. Replace the rubber cover and interior mirror cover.
   
8. Step 4 Put the front door trim panel back in place by securing all clips and tightening all screws.
   
9. Step 5 Connect the Subaru Outback's battery cable to restore the power.
   

i will recommend i site where you will get all the information you need to remove and replace your side mirror
http://www.wjjeeps.com/mirrors.htm

On the inside trim, you can remove screws that are by the door handle, arm rest, under door and side of door and then gently pull back on the panel as there will also be retaining clips attached and you don't want to break them. You'll need to lift the door panel upwards in order to get it off the window ledge. Then you'll need to manipulate the panel and disconnect the door handle linkage from the door handle and disconnect the wiring for your controls. Then you can access the bolts that secure the mirror onto the door

For a 2005 Honda Pilot, I am a complete Amateur and I had no problem installing this mirror.

1) Lower the window, and only remove the Interior MIRROR panel, NOT the entire DOOR Panel, as some sites my recommend.
2) Once the Interior Panel is removed, the power cable is attached to the mirror, remove this cable.
3) There are 3 Bolts that are BLACK (atleast in my vehicle) that need to be removed.
3) Once the bolts are removed, the mirror should come off easily.
4) Place the new mirror in place of the old one and secure all three bolts, and then secure the power cable.
5) Then place the interior panel back.

That is it!

the whole asssembly or just the mirror glass?

take out the tweeder covers if you have tweeders or remove the triangle covers were the tweeders woud be ,then stuff a klittle foam in their,worked for me

Both above answers are not right... I just replaced the Pass side power mirror assembly on my 97 Expedition. No heat, no directional.
The inside door panel must come off.
1. pry off interior triangular plastic trim piece inside of door at mirror area. Remove door panel screw at this area.
2. Pry off power window switch panel and remove door panel screw at this area.
3.Remove interior door light cover and remove screw at this area.
4. Remove plastic cover at door handle.
5. The interior door panel can now be lifted up to release it from it's fasteners.
6. Disconnect light and push power window switch assembly through the door panel and it can be set aside.
7. Disconnect mirror power at coupler.
8 Loosen three mirror mounting screws with 7/16 socket. DO NOT unscrew completely.. the will fall down the door cavity. Use a round magnet on holder to remove the screws completely.
9.Thread electrical connection into door panel and install mirror.
10. Smile when mirror works and drink a beer!
rayman

You need power window regulator as the cable of the regulator is out its place ,

1. Remove the gusset cover.
2. Pull up the inner door handle cover toward you to remove the upper hook. Pull down it to remove the lower hook. Remove the inner door handle cover.
3. Remove the power window switch assembly.
4. Using a trim panel remover, remove the clips of the trim panel.
5. Remove the speaker.
6. Using a spatula, remove the door sealer.
7. Remove the outer mirror assembly.
8. Remove the front end of the door weatherstrip and gusset.
9. Remove the stabilizers.
10. Remove the rear end of the door weatherstrip (inner and outer).
11. Operate the power windows switch so the bolts from the regular assembly are visible through the service holes. Remove the mounting nuts.
12. Take out the door glass. CAUTIONDo not turn the regulator in closing direction after removal of the glass. Otherwise gear may be disengaged.
13. Loosen the nuts to remove the rear sash.
14. Disconnect the power window motor wiring harness.
15. Loosen the four bolts and two nuts to pull out the regulator assembly.
16. Remove the screws to remove the motor from the regulator assembly.
17. Installation is the reverse order of removal.

Good luck...