factory amp and sub not working with aftermarkethu

  1. R

    How to connect a subwoofer to a new stereo

    Hi, I have a Chinese Android radio, 4 speakers play ok.I recently checked that there is probably a subwoofer in the Ford.How to check if it is really there, which cables to connect to hear if it works without removing the upholstery. All I need is information about which cables activate the...
  2. W

    Rear speakers and amplifier/sub not working

    I just bought a 2004 expedition Eddie Bauer that already had a newer double din head unit installed in it but the rear door speakers, sub and amplifier aren't working. I’ve installed every after market head unit in each vehicle I’ve owned over the years and have never run into a problem as...
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