hey guys i have a 2006 dodge cummins and i recently decided to boost my sound system with some new equipment. Id like to switch headunits in the truck but the can-bus system is freaking wierd. Ive heard you can just buy the normal wiring harness for it and just run the ignition switch to your cigar lighter for the aftermarket headunit and not have to buy the 100$ harness. Any input would be great!!