66 - Internal Main Relay Shorted

Test 1-2:

Test 3-4:

SYMPTOM
INTERNAL MAIN RELAY SHORTED - 66

WHEN MONITORED
Ignition on.

SET CONDITION
When the relay feedback voltage is high when the power relay is supposed to be open.

POSSIBLE CAUSES
- INTERMITTENT DTC
- OPEN FUSED B(+) AND FUSED IGNITION SWITCH OUTPUT (RUN)
- OPEN GROUND CIRCUITS
- CAB - INTERNAL CONCERN