Very dumb question but...
I just hooked up my AVic 90B using a GMAHL1. I hooked up the speed sensor wire from the deck into the output wire on the GMAHL1 hoping that my vss wire would be behind the stereo already instead of having to tap into it from somwhere else. Anyways my question- Is there somewhere to confirm that the speed sensor is actually working, when I go into GPS settings (where you see all the available sat.) It does display MPH, I'm not sure if it's using the Sat to gather that info or if it is actually using the speed sensor. It seems to be accurate and fast so I'm not sure.
Thanks for all the help for the newbie!!!