Audible Warning Device: Description and Operation

The Audible Warning Unit (Z109) receives power at all times. It also receives battery voltage with the Ignition Switch (X134) in position II. It receives a ground signal from the Driver Seat Buckle Switch (X120) with the seat belt unbuckled. It receives a ground signal from the Driver Door Switch (X118) with the door open. It receives a voltage signal from the Ignition Key Switch (X177) with the key in the Ignition Switch (X134). It receives a ground signal from the Transfer Box Position Switch (X175) with the transfer box in positions H or N and a voltage signal via the transfer box resistor with the transfer box in position N. The Audible Warning Unit (Z109) sounds a warning tone if the key is in the Ignition Switch (X134) with the driver's door open, or with the transfer box in neutral or with the driver's seat belt unbuckled.