Ford Transit Upfitter Switches
When ordering a custom Ford Transit you can add Upfitter Switches, also called auxiliary or accessory switches. These switches allow you to control accessory items like lights, winches, or inverters with factory looking switches.
The switches are simple on/off style with an indicator light located in the center console between the driver and passenger seats. If the key is in the ignition or run position and the switches are turned on (flipped up), they provide a 12 V and 20 A max output.
To order the switches you need to add code 67C to the order:
User-Defined Upfitter Switches (4). Requires Heavy-Duty Alternator (63C) and Dual Heavy-Duty Batteries (63E). Includes Modified Vehicle Wiring System (53K), Customer Connection Point and Auxiliary Fuse Box (87E)
To connect anything to the switches you can find their output on connector C33-H under the driver’s seat.
Unfortunately Ford made accessing this connector very difficult. It requires removing the driver’s seat (4 T-40 Torx bolts), removing the battery box lid, and then a frustrating amount of time trying to fish out the connector. The connector isn’t just sitting deep in a crevice, it’s attached to one of the wire bundles with electrical tape.
We used a hobby knife to reach down and carefully cut the electrical tape. We then used 2 very long flat head screw drivers to wiggle the connector free and out from under all the stiff wire bundles. This is a practice in patience, don’t attempt this if you’re in a rush.
Once you have retrieved the C33-H connector you can plug in the pigtail EU2Z-14S411-XA so that you can easily connect accessories to the switches. The plug has bare wires so you can connect anything you want to them, we added quick disconnects for now.
We plan on using one of the switches to control the house battery charger and the others might control exterior lights, we’re not sure yet.