I have a 2021 Ram 3500 Dually Diesel. I need a little help with upgrading my auxiliary switches I just purchased the new Aux switch set to add in the front and rear park sense and then I went to the fuse panel for it and I only see three relays and three fuses my truck said it comes with the tow haul package as well as the exhaust brake But I don't see the two up fitter connectors next to the Aux power distribution center Any help would be appreciated and can provide my Number if the is easier.
The HD diesel trucks come with the AUX PDC box as it is the host for the electric cabin heaters (those 3 relays and fuses).
However, none of the other wiring for the Aux switches is present if not factory ordered.
Aux switches have nothing to do with front/rear park sense. Unless you're also adding those parts (wiring, sensors, bumper/covers), and coding it with AlfaOBD (or JScan) as part of adding Aux Switches.
The TOP row are option switches, For a diesel with F/R park assist and no rear air:
Tow/haul, exhaust brake, front and rear park assist:
19-21: 68476031AA (now replaced by 2022 part number)
22+: 68578994AA
The BOTTOM row are AUX1-6 switches. The switch assembly replaces the standard piano keys option only switches.
Head on over to hdrams.com, see this thread (below). The OP can build you a nearly plug and play wiring harness setup. The correct aux panel part numbers (depends on other options) are also listed in the thread.
There are quite a few threads about Adding Aux switches and AlfaOBD to our trucks out there. I did hours of reading them and watching numerous videos on it as well as messages back and forth to get this installed on my truck. I wanted to make a DIY for someone else that wants to do it and keep...
hdrams.com
