Hi, just install 6000nex and the nav wont work. Just get a black sceen then goes back to previous menu. Antenna hooked up green wire grounded. When driving no maps just displays no speed sensor. Any help would be great. Thanks

Did you do the reset?

Yes

you need to hook up the speed sensor wire (pink one) to your vehicle's VSS wire.  I had to do quite a bit of googleing to find where to hook in up in my Subaru.  Hit up the search engines. 

Thanks, ill try that.