Here are some info to arm you for your discussion with the dealer tech
Most of the IBC's I've checked out uses MC (master cylinder, brake) PSI
It senses pressure as your foot moved the brake pedal...that is connected
to the MC piston rod that pokes through the firewall and into the
passenger compartment
There is normally about 1/8" travel of the foot/brake pedal BEFORE it
starts to move the MC piston
MC PSI sensed will vary the signal power sent to the trailer brakes via
the IBC
At startup, all systems should send a: "I'm here and okay" to the master
computer. That will cycle every so often and dependent on the software
If your IBC doesn't say that...the master computer will not know it is
there...therefore nothing sent to the trailer brakes...but you say the
manual lever works...so it is 'in the system' in some fashion. That is
where the tech must start from
Since your TV has all of those subsystems...they all must plug'n-play
with each other. That is also where the tech must confirm
Good luck !
PS...if they can't dial it in...you can have them remove it and replace
with a P2 or P3 and is my choice on that matter
