Warning System

A secondary system, using vehicle's brake warning light will warn driver of certain types of failure in system. Brake warning light comes on under following conditions:

1. Pressure modulator activated (diaphragm and plate displaced to rear) in absence of brake light signal.
2. Controller sends signal to open modulator air valve in absence of signal to open by-pass valve.
3. Electrical continuity of air valve lead wire broken.
4. Controller does not receive all speed sensor signals, or signals are not properly converted at speeds above 15 MPH.