Ok so here is going to be a brief DIY Wiper Fix... Now I took my wiper motor apart (busted through the rivets) so I can figure out how they work. I could put it back togethor, but since I bought a working motor for $40 I put the old one in the circular file (trash)
Step 1:
Remove your wiper motor (use this link if you need help)
http://www.saabcentral.com/forums/showthread.php?t=172654
*note* removing the arms can be a PITA I had a friend help me by beating on the shaft that sticks up with a punch and a hammer as I pulled the $#!T out of it and it eventually came off
Step 2: (optional, really don't need to)
Remove the actual motor assembly from all the linkage. (sorry didn't take pics of this either) but it is easy 2 10mm bolts in the arm and a 13mm on the motor...you will get it once you look at it.
Step 3:
Locate where the brown wire goes into the assembly (stole this pic from the other thread, so look at the old motor on top)
that is where the problem is.... Take a screwdriver or something of your choice and start picking that ish out. After you get a few mm down you will see a resistor.
Step 4:
That is where the problem is...either the resistor will go bad, or just become disconnected... so basically all you have to do is take it out, and then remove the little clip it was soldered on to. and don't worry if it comes off the Brown wire...it will be getting replaced.
Step 5:
take your resistor and look real hard at it. Don't look away for about 3 minutes.
Step 6:
ok now that you wasted 3 minutes, get a new resistor, I wouldn't even try to reuse this one, but you can if you want. It is a 150ohm resistor
Step 7:
Take your new resistor and solder that little female connector on to one end, and then solder the Brown wire on to the other end. Clip that connector back on there.
Step 8:
Fill that little area back in with some epoxy or some adhesive that is non-conductive.
Step 9:
Put everything back together, and wipe away my friend, wipe away!!!!
Here are a couple pics of the actual switch inside the motor