Test L: The Fire Suppression System Indicator Is Always On (Police Vehicles Only)

PINPOINT TEST L: THE FIRE SUPPRESSION SYSTEM INDICATOR IS ALWAYS ON (POLICE VEHICLES ONLY)

L1-L2:

L2-L4:

Normal Operation
The fire suppression module (FSM) is hardwired to the instrument cluster through circuit 2318 (LG/RD), and is grounded through circuit 1203 (LG/RD). If a fault occurs in the fire suppression system, a diagnostic trouble code(s) are set and the FSM grounds circuit 2318 (LG/RD) to illuminate the fire suppression system indicator. The FSM connector is equipped with a shorting bar that will ground circuit 2318 (LG/RD) when the FSM is disconnected to illuminate the fire suppression system indicator.

Possible Causes
- circuit 2318 (LG/RD) short to ground
- FSM
- instrument cluster