No alarm in add-on wired trailer TPMS?

[SomebodyInGNV]

I enabled Ford's wired trailer TPMS in my '21 Job 1 XLT by replacing the rear wiring assembly to fully populate the 12-pin connector, updated all software with FDRS and made edits with FORScan. The truck now recognizes the trailer TPMS and displays the PSI values. I don't have temp display which I believe is related to having an analog, rather than digital, instrument panel.

Programming the TPMS sensors works and includes setting the alert level. Unfortunately, the alerts don't work. I get nothing, despite the alert level being set well above the displayed PSI.

What do I have to do to get alerts? Are there settings I can change with FORScan, other than those required to display the information?

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[fordtruckman2003]

If the alert level is over your current psi how do you know the alert doesn't work?

Set alert lower than current and let some air out of a tire and see if you get an alert then.

 

[SomebodyInGNV]

If the alert level is over your current psi how do you know the alert doesn't work?

Set alert lower than current and let some air out of a tire and see if you get an alert then.

Setting it higher was just my trying to make it do something, anything.

I didn't let air out after setting the alert lower than current PSI. I didn't think of that being a requirement. I'll try that when I'm hooked up again.

 

[fordtruckman2003]

Can't hurt to try is my thought. If it still doesn't work then I would say it is definitely broken. You might need someone in the cab to see if an alert pops up on screen.

 

[SomebodyInGNV]

Can't hurt to try is my thought. If it still doesn't work then I would say it is definitely broken. You might need someone in the cab to see if an alert pops up on screen.

I'm not sure "broken" is the right description. I think it's user error in my attempts to enable it with FORScan.

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