Don Ridley

Pressing the switch on the tailgate sends a GND signal to the BCM to tell the BCM to open the tailgate. If your connectors are differnt from the 2016 wiring diagram you will have to do some testing to find the right wires. First, find the wire going to the BCM from the tailgate switch. Measure each wire with a voltmeter. Find the one that goes from 12V to 0V when the switch is pressed. Next, find a ground wire. Use the resistance setting on your voltmeter to measure 0 ohms between a metal ground point and the wire. If you are not sure of the proper ground wire then you can connect to any piece of metal on the tailgate for a ground. Connect one terminal on your new switch to the GND point (or wire) and the other terminal to the BCM wire you found in the fist step. When you press the new switch the BCM wire should go from 12V to 0V and the tailgate latch should activate (tailgate has to be closed to activate).

You do not make changes to a Transit Connect using "as built" data. Look for menu selections under BdyCm (main). You will find global window options.

Here was my solution. https://fordtransitconnectforum.com/topic/6031-turn-on-all-interior-lights-2016/

As you already mentioned, your 2014 may be an early version that had different firmware. My only suggestion is to try different Forscan settings, even ones that dont seem to apply or make sense.

Bad adapters have caused a lot of weird problems. Using a recommended adapter like the MX has been a solution many times. Fingers crossed...

You may have a special situation, but your screenshots show you are not in engineering mode as required by Forscan. See attached.

It is in front of the driver side wheel. Remove the bottom and front panels to see it clearly. See attached. pcm.pdf

Here are the tire options in Forscan for my 2016

Here is information from a 2016. The 2021 should be similar. A Ford Focus uses the same actuators. hvac.pdf

Long enough for me to give up looking for Fifty's tranny fluid change instuctions. I had to rely on some random youtube video 😞

Passenger and cargo van seats are interchangeable. Some passenger seats have electronic position controls that may require some research to install. I don't think the passenger seats are better....maybe just better upholstery. Many owners have installed riser blocks under the seats to improve seating postion. There are several posts on this.

Here is the wiring diagram for the stock radio (ACM) in the basic configuraction (MECHLESS) and the higher trim levels. Hopefully you can track down the ACC wiring. acm basic wiring.pdf acm wiring.pdf

Use Forscan but you will need to run Windows on your Apple (not sure how to do this but many have reported it works).

I think the OP is asking about full size Transit vans, not the smaller Transit Connect. This forum is only about the TC vans.

Forscan is not sophisticated enough (and probably not even Ford IDS) to determine what hardware is installed for the various optional features. For example, you can activate cruise control in Forscan without having the correct steering wheel. This has caused some problems for users who inquisitively change Forscan settings to see what will happen. But apparently you are safe to reset BMS without the additional hardware.