Bus (+/-) Signals Open From Instrument Cluster

Test 63 - 69:

Test 70 - 75:

Test 76 - 79:

Test 80 - 81:

SYMPTOM
BUS +/- SIGNAL OPEN FROM INSTRUMENT CLUSTER

POSSIBLE CAUSES
- Ground circuit open
- Defective cluster fuse
- Defective fuse
- Fused ignition switch output wire open
- Fused B(+) wire open
- Fused B(+) wire short to ground.
- PCI bus circuit open
- Cluster defective - PCI bus open
- Instrument cluster defect - fused B(+) shorted
- Instrument cluster defect - fused ignition switch output shorted
- Fused ignition switch output wire short to ground