This shows the 10 way connector pulled out from under the dash. (the other cable in the picture is going to the front roof.)
Finding the spare wire (blue) under the dash has been reported to be difficult. It is included in the side body harness which runs from the 6 way multiple connector at the LH rear of the coach to the 10 way multiple connector at the front of the coach under the instrument panel upper LH side of dash panel.
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