Flat bed
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Mountain Pass
Joined: Oct 2010
Posts: 134
Likes: 6
From: Ash Flat
Flat bed
I swapped my stock bed for a flat bed on a 2021 F-250, the person i got it from forgot to give me the adapter plug, he has put it in the mail, but with everything unhooked from the bed and bumper, my computer is confused, TPMS fault, several other faults, and no control of the heat and air, anything i can do before I get the adapter to get heat control??
Laughing Gas
Joined: Jul 2017
Posts: 1,204
Likes: 513
What trim level do you have and did it have BLIS sensors in the factory tail lights? If so, the wiring adaptor isn't going to fix the HVAC issues. It needs to go to a dealer and have that system deactivated.
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Mountain Pass
Joined: Oct 2010
Posts: 134
Likes: 6
From: Ash Flat
XLT and yes it had Blind spot detection
Tuned
Joined: Nov 2020
Posts: 356
Likes: 85
From: South Georgia
I wouldn’t pay the dealer anything until you have the flatbed adapter and everything plugged back in. As mentioned you may have to deactivate BLIS. Unplugging all that stuff will totally disrupt the truck’s communication and cause the issues you have.
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Mountain Pass
Joined: Oct 2010
Posts: 134
Likes: 6
From: Ash Flat
Adapter installed, lights work, every thing is back to normal except backup camera, I can live with that till the snow and sub freezing weather is over
Dealer did turn off BLIS system
Dealer did turn off BLIS system
Last edited by hiredgun; Jan 23, 2026 at 01:16 PM.
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Mountain Pass
Joined: Oct 2010
Posts: 134
Likes: 6
From: Ash Flat
Update
Updated my forscan, turned hyper flash on dash off caused by led lights, reinstalled park aid sensors, they work, enabled camera , but camera still not working, tried aftermarket camera, still get the see dealer message or black screen, any ideas would be great,, 2021 F 250 XLT non 360 camera system, BLIS is turned off, no error codes
Lead Driver
Joined: Oct 2018
Posts: 7,894
Likes: 2,372
I just put a new flatbed on a '22 with all the sensors. I had to take it to the dealer to have the blind spot taken off and the turn signals reset for the extra load but it caused no issues before I had that done except throwing notifications and the blinkers flashing too fast.
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