No GPS Signal

After some hard off roading up in Maine, the onboard navigation is not getting a GPS signal (at best it is intermittent). Shows the NO GPS icon on screen and is placing me in areas that I am not; like the middle of Atlantic ocean.
Ford tried resetting the Nav back to factory settings and manually telling it where I am but that did not solve issue. They referenced that "4 pin"(sic) might be shot but I am thinking I have a loose connection due to hard jumping and occasional intermittent signal.
Anyone know where that connection might be?

it plugs in on the backside of the radio. there are also 2 data wires that control the gps antenna in the 54 pin harness

Can I access through small shelf above radio or do I need to remove dash to get to back of radio? Also any hint as to which connector?

you have to pull the dash out. its the only big connector that plugs into the screen.

Gracias!