USA models have a warning system. If the seat is occupied, the weight switch sounds a buzzer unless the belt is fastened.
To supplement the buzzer sound, 1972 models also have "Warning" lamp prominently situated on top of the dash.
USA 1972 Owners manual (see pages 9 for warning system):
Buzzer
The buzzer is located under the dash. Here is a 1971 dash showing where it bolts:
1972 location, under passenger side of dash:
Switch
The front seats have a weight-activated switch. It is important to get the switch in the correct position (see FSM for specific locating details).
Wiring
Seat Belt Buzzer wiring schematic:
Switch Wiring Colors:
- White - to warning buzzer
- Red - to 15A fuse in Fuse box (IGN side), L (blue) wire at box
Buzzer
- Red - through door switches to ground
- (BR wires on door switch)
- W - to warning switch