Good evening y'all.
So, I've got a wierd one here. I have a 2016 f150 Lariat crewcab. A few years ago I swapped out my OE mirrors which has power fold, BLIS, blind spot signal light, etc, for manual folding tow mirrors. Everything worked as it should before removing them. Today I reinstalled the OE mirrors and while The drivers side works as it should, the autofold and blind spot light on the passenger side are not working. But, the mirror glassadjustment motor is working. I don't know if BLIS is working yet.
I checked the passenger door module fuse and it's good. I decide to do a bench test of the mirror to see if it actually works at all. At first I could only get the motor to fold in on the bench test. So I tore the mirror apart further and found the two wires going to the motor had been pinched and possibly shorted. I fixed that and once again tested the motor and it works fine in both directions. I double checked the pins on the truck harness, and I have no power getting to the pins at the harness. My manual only relates one fuse to the mirror, and that is the 30a door modlue, but I went ahead and tested all of the fuses behind the passenger kick panel and they all tested good.

Is there a different fuse I need to check? I can't imagine the 30a is the only fuse for the simple fact that all of the wiries going to the mirror are only like a 18-22ga

Thanks!

 

Check the smart junction box under the dash on the driver’s side. There’s a small fuse specifically for the passenger mirror fold function, separate from the main door module fuse. It’s labeled something like “MIRR AUTO FOLD” and is usually a 10a. Even if the big 30a fuse is good, that little one can blow during reinstallation. Also make sure the connector at the door harness isn’t loose

 

Thanks! I got home early today and looked up under the dash. I don't have a fuse/junction box up there. I googled a bit and I think what you are referring to is the BCM that is located behind the passenger kick panel on my 2016. All od those fuses test good.