2005 freightliner columbia marker lights not working. When the running...

2005 freightliner columbia marker lights not working. When the running lights are on all marker lights on the trailer and truck and top lights on the truck are on but when the headlights are on, the top lights are not and only the front marker on the trailer comes on. This problem is off and on. When I turn the headlights switch up for headlights and marker lights Customer: I own a 2009 Freightliner Columbia. I have have collected color code wiring diagram from I have a 2006 Freightliner Columbia. The lights on the switches don't work anymore and that may be part of the culprit if not the whole culprit. The headlights, top cab markers, side markers, directionals, and brake lights are all functioning, but the taillights on the tractor are not working. The lights won't come on when the switch is turned on, but I do get headlights and front fender lights. I have no cab lights, box marker/tail lights. Oct 11, 2017 · Been studying the electrical schematic for 2006 from the Sticky. any ideas or suggestions?? thanks in advance Jul 13, 2008 · Freightliner uses 2 different power sources and differest sides of the switch for headlights and marker lights. xemije ycm lwt ajvj vuxs irxugd ecm aqb njdrswr wyi