[icspots]

Try looking here.

:arrow: http://www.mazda3forums.com/index.php?topic=7335.0

 

[icspots]

it could also be the difference between with homelink and without. Regardless there should only be constant power, switched power and ground that need to be hooked up.

 

[icspots]

Can't think of what that fourth wire would be if you don't have the temp. display. I only have the standard auto-dim otherwise I'd go check for you.