Satellite reception for GPS

[hibble1 10+ year member]

I recently had a pioneer Avic N-3 installed in a 2007 Lincoln Executive L everything works fine except navigation cant hold 2-3 bars on satellite reception indicator so it goes off location starts giving wrong turn etc.Since the Xm plays fine replaced the GEX-P10XMT figuring it may have been bad,but by this time was frustrated and installed a Garmin Street Pilot for a back up I loved my last Garmin but I'm getting the same response lost satellite reception,so my question?is there a special ground or blocker that is specific to the Lincoln towncar causing this problem.Anyone know where I might find answers and solution to this problem?Help

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[LinxuS 10+ year member]

Where's the antennae mounted for the AVIC-N3? I have never gone below full signal on mine..

 

[hibble1 10+ year member]

It was under the dash now its on the left side on top and the garmin is on the rear trunk

 

[hibble1 10+ year member]

Problem solved contacted Alarm manufacture and they suggested disconnecting alarm antenna to see if I needed a two way anntenna as soon as installer plugged in two way I got mad signals,better than before alarm was installed now um gettin NASA.

 

[IMXELITE 10+ year member]

Hey you should post some pics of the install