Thank you for the information printed on the panel of BCC which was good to know and slightly helpful. It did put a name to the power input P13 which has no power going to it. If I add power to P13 it energizes the dash allowing me to bring dash controls online, but does nothing to help me engage the starter. The line is engulfed by a large bundle of other wiring sealed with black plastic. The P13 line is also a fuseable link. I did try the switch which uses the coach battery to assist in the start up with no success.