paysum1

The highway I was driving on is in rual Alberta and has been there more than 15 years..The highway shows up on the Nav map and it tracks the same speed as im going just my icon on the map jumps on and off the highway only while I am driving North or South, never East or West. I guess not to many country people have Navigation in the areas I tend to travel.

I recently installed a Avic D3 into my 2003 Ford F-150, I live in Edmonton Alberta but travel outside of Edmonton frequantly. While out of town, heading south on a secondary highway my icon on the nav would jump on and off the highway. This seems to only happen while heading either south or north but never east or west. It also seems to happen outside of Edmonton only, never while in Edmonton. I do not have my VSS wire hooked up but the GPS antenna is on the top of my truck in clear view of the sky, I was curious if the VSS could be the issue? if so why would it happen only while heading north