Roadmaster V8-350 5.7L (1994)
Audible Warning Device: Component Tests and General Diagnostics
Courtesy Lamps
When CKT 156 is pulled low because a door has been opened, the Warning Alarm will ground CKT 1393. When CKT 1393 is pulled low, the relay
contacts in the Dome Courtesy Relay will close, allowing CKT 149 to go low via CKT 450. CKT 149 is the ground side of the Courtesy Light System.
CKT 149 can also be grounded at the Headlight/Panel Dimmer Switch.
