Got an Outback S-Lite to use on the sprayer.  We normally have rows to follow, but sometimes after planting it is hard to tell where you are and I thought it would help find the right row when turning.

It is very inaccurate.  Sometimes it is right on and other times the light is several off.  Turning, it is not much help.  The antennae is installed on the front of the cab(at the top), as recommended in the instructions.  It looks like it might be losing the signal, but not sure.  The display has some bars that I assume is signal strenght.  That seems to vary based on which direction I am going and where I am.

Anyone have any ideas as to what might be wrong?  Looks like I wasted my money.