Hello. I've searched the forum for possible solutions for my issue. I saw some other posts on the same topic , tried the suggestions but no luck. I have a z1 upgraded to a z3 (garrettoomey's drives). All connections are fine (vss, speed pulse etc.) GPS signal is good. My problem is the compass is in the wrong direction when going east or west. North and south is fine. Ihave no problems using the maps and the system gives me the proper turn by turn directions. I've gone ahead and reset calibration several times and it will not work. Now I purchased this unit used and it was in another vehi