Loss of Ignition Run Only (Active)

SYMPTOM
LOSS OF IGNITION RUN ONLY (ACTIVE)

WHEN MONITORED
Continuously with ignition on.

POSSIBLE CAUSES
- Active code present only with PAB ON/OFF SW OFF
- Ignition switch output circuit open
- Fuse #18 defective
- Fused IGN SW output CKT short to GND
- Fused ignition switch output circuit open
- ACM DEF fused ignition SW short to GND
- ACM DEF fused ignition switch CKT open