So I have scoured the entire internet and have not found an answer to my question, and need some guidance if anyone can help.
I have a '06 Econoline E-350 XLT 5.4l that was outfitted as a wheelchair transport van in its former life. As such, they installed a wheelchair lift with controls that interface with the parking brake, transmission, and passenger door switch. I pulled most of that circuit out, but not sure if I got it all.
My VIN allows me to lookup parts for cruise through ford's website.
After watching all of the videos I could find, I sourced a steering wheel and clockspring with cruise. My cluster does not have a cruise light. For fear of the cruise control buttons not working, I bought a brand new set of buttons and installed everything. Buttons work fine and light up, horn works. As to cruise...No luck. I took it to ford for an alignment and asked them to check the PCM to turn on cruise. They said they could not do it.
I then ordered the cruise cutoff switch and replaced it on the master cylinder. No luck.
Then I checked the fuse box. My "shift interlock" fuse is missing, so naturally I tried to stick one in there. There are no contacts in the slot. I tested the column shifter, and it does not lock the steering wheel position with the key removed, and the key is not locked into the ignition when turned. I cannot turn the ignition switch without the key.
My gut says there is still a harness somewhere that has disconnected the shift interlock, but wouldn't that LOCK everything vs unlock everything?
Can anyone point me to the physical wiring location for this circuit?
I've seen other threads where the shift interlock not functioning correctly will prevent the cruise from arming, and this is my last troubleshooting option.
Here's the wheelchair lift switch: