Medium and Heavy Trucks
Have Truck Repair Questions? Ask an Expert
Hi Justin, My name is***** will be glad to try to help. Test all your fuses for power on both sides by probing the two top metal tabs on the fuses with the key switch on. Any fuses with power only on one side are bad. If all fuses test good then your problem is likely in the wiring at the rear if you changed to complete light assemblies, or a faulty flasher, multi-function switch, or turn stalk module. KW uses a turn stalk module on these trucks. Click on this link for more information.
Also, Click on this link for some more info to help with the tail light wiring