Glow indicator lamp: Notes

Fig 1: Identifying Communication Diagram - Glow Indicator Lamp

Courtesy of SAAB-SCANIA OF AMERICA, INC.

Fig 2: Identifying Communication Circuit Diagram - Glow Indicator Lamp

Courtesy of SAAB-SCANIA OF AMERICA, INC.

The glow indicator lamp goes on during pre-heating.

The lamp is powered by the main instrument unit and is grounded by the main instrument unit control module. PSG 16 sends continuous bus information Pre-heating, unit ON/OFF.

When pre-heating is ON, the control module will ground the lamp output so that it goes on.