Hmm, this might sound real silly, but my friend has a 91 and I have a 90. My sunroof just opens all the way when I hit the button. On his it stops after it is fully tilted, then you have to rehit the button before it goes back. How is it suppose to work from the factory?

 

On my 88 and 90, one touch vents it, and two opens it all the way- that's the way it is from the factory.
I don't know why yours doesn't do that- maybe the cutoff is corroded.

 

Now where is that switch, just wondering. Not that I care

 

my 87 TII opens like yours bambam7

 

my 89 GXL is a two-touch to open fully