Overspeed Alarm (UD4)

Voltage is applied through Engine Compartment Fuse D1 and CKT 741 to terminal B of the Overspeed Alert Module when the ignition is in RUN. The module is grounded at terminal C through CKT 250 at ground G107. The PCM supplies the Overspeed Alert Module with vehicle speed (at terminal A through CKT 381) from terminal 1B7 at a rate of 2,000 pulses per mile. When the vehicle speed exceeds 120 kmh (75 mph), the module sounds its alarm.