Originally posted by DKC
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Anyhow, I'm tempted to read the DTC as a connector problem for antenna 2 (FM reception - I assume), rather than relating to the workings of the amplifier. 0 dB reception for this aerial doesn't seem like a good number (neither does 0mA).
Given that the error message refers to "open circuit" (so yes, I agree with your statement that you "have not short circuited anything"), it suggests that perhaps a wire connection was displaced when the dash-cam cable was being routed to the rear ciggy plug (behind the trim). Just a guess of course - but it might be prudent to check the dashcam power cable route for any near-by connectors (I think)!
Don
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