i have a 2006 f350 superduty king ranch dually 6.0 diesel

i wanted to know do they come with a j brake and also if any one is familiar with this year and model what the aux switches do or are for thank you

 

Your truck has a 'Tow-Haul' feature that selects lower gears while towing and provides engine compression braking. The system works quite well. Just press the button on the end of the shift selector to turn the system on.

The Aux switches are a set of switches and relays that you can use to hook up extra electrical devices. Backup lights, high idle, driving lights, etc can be hooked up and controlled by these on-off switches. Two switches have high load capacity (30 amps) and two others are lower capacity (10 amps).

Much of this information is in the FAQ or technical guide section of this board. Users here find many ways to use the up-fitter switches.

Lou Braun

 

as a side note, the Tow/Haul function makes your truck much more fun to drive around town. gives her a bit more pep