That’s why you must use a VIN of a truck that already has AUX switches AND the same options as your truck. Use THAT VIN, not yours, to call a dealership parts department, and they will tell you what part number left dash harness you would need, and current available part number that supersedes the discontinued one.Here's left dash wiring harness part numbers. I searched using my VIN but it looks like bunch of harness variations for 2500s are listed. It doesn't look like you can buy them.
(68460156AB) - Dash Left Wiring For 2020 Ram | Don Jackson Chrysler Dodge Jeep Parts
Mopar Genuine OEM Dash Left Wiring Part# 68460156AB Fits 2020 Ram: Up To 35% Off On Every Order And Guaranteed Fit When You Enter Your VIN!parts.donjacksoncdj.com
