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2009 F-150 Lariat 4x4: The compass and the back up camera quit and/or start working at the same time.
Don't have the nav system so the compass is above the radio and the camera screen is in the review mirror. The compass will show two dashes instead of the direction and the video does not display in the mirror. The back up proximity sensor and the beeping alarm always work.
Any idea why this is or how I can troubleshoot the problem?