that canceling plate is attached to the bottom of the steering wheel, and is what clicks the signal off as the wheel turns back, the wheels from trucks without the signals didn't have it, hopefully you do
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics