Ford Transit Upfitter Switches - Morey's In Transit I didn’t plug the other multi wire harness in since I have no need for those circuits. I just assumed the 4 wire connector was for the Aux, switches and did not test them. Could be I was wrong and there not for the switches. It would have been nice if Ford provided info with the wiring kit. "Upfitter Wiring Harness" option - Ford Transit Connect Forum Sep 18, 2017I just ordered a 2018 Titanium LWB Transit Connect wagon yesterday. One of the options I ordered was the "Upfitter Wiring Harness", about $50. I can't seem to find out any detailed information on what this includes? Switches? Wire pigtails? Connectors? The regular full size Transit Has info but nothing on the Connect for details.I just ordered a 2018 Titanium LWB Transit Connect wagon yesterday. One of the options I ordered was the "Upfitter Wiring Harness", about $50. I ca..When I was researching this topic while considering doing a special order before I got my 2015 I was similarly stumped for info. I did find a few r..My 2016 service manual wiring diagrams don't reference any upfitter options. There are taxi and crew chief wiring options. The crew chief does not..Thanks for the replies. I'll keep digging and let you know if I find something. I have an ARB 50qt fridge/freezer that I'll be mounting in the back..It is worth the wait to get all the factory options you want. Some options can't be added later without some loss of function (tow pkg for example).