Test Z: The Public Safety Equipment Power Supply Is Inoperative

PINPOINT TEST Z: THE PUBLIC SAFETY EQUIPMENT POWER SUPPLY IS INOPERATIVE

Z1:

Z2-Z4:

Normal Operation
The police power relay (switch side) is supplied battery voltage from the battery junction box (BJB) fuse 112 (40A) through circuit 175 (BK/YE). When the ignition switch is in the RUN position, the police power relay coil is supplied voltage from the central junction box (CJB) through circuit 964 (DB/LG). Ground for the police power relay is supplied through circuit 57 (BK). When the police power relay is energized, voltage is routed through circuit 401 (PK) to multiple police systems.

Possible Causes
- Fuse
- Circuit 57 (BK) open
- Circuit 175 (BK/YE) open
- Circuit 401 (PK) open
- Circuit 964 (DB/LG) open
- Police power relay