Are there only four wires? If so, there could be as many as: switched positive hot +12VDC, unswitched positive hot +12VDC, dimmed 0-12VDC, and the antenna output. There could be only four if Becker got its ground (negative) from the chassis. I take it the speakers are wired onto a separate plug?


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Robert W. Roe
1984 300SD 167K mi