GPS / Radar detector doesn't work in ZJ?
I have a '96 Laredo 4x4. There is apparently something in the vehicle causing interference with GPS reception and radar reception. If I plug either device into the power outlet with the key off/engine off, they work normally. The Garmin GPS will pick up 3-7 satellites, depending on time of day. Turning the key back to "Aux", (with the engine, radio, and fan off) causes all satellites to drop immediately. ZERO reception. Turning the key off lets the Garmin re-acquire satellites. Same when driving. I've left the GPS on for hours when I'm driving around, and it won't acquire any satellites.
It's not just the Garmin either. Navigation with my iPhone is severely wonky in the Jeep, and my Valentine One has never sounded (not once) in the Jeep.
These devices all work normally in my BMW.
What could be causing this? Has anyone else had this problem?