I have a 2005 mountain air on a spartan chassis 4030. I'll putting on a brake control , found the plug up front that has a "tag tow ". Four wires two red, one blue,an a pink.the blue runs to the trailer plug.There is no power to the plug up front.Over the gen there are 5 pressure switch , remove the wires The brake light is still on. Can any one tell me where the brake pressure switch is located , or where the other end of the plugs "tag tow" is located ?
2005 madp m4030