No Bus Bias

Test 1 - 3:

Test 4 - 8:

Test 9 - 10:

SYMPTOM
NO BUS BIAS

POSSIBLE CAUSES
- DRB- NO bus bias
- Fused IGN SW output open - instrument cluster
- Instrument cluster ground CKT open-no bias (CAV 4)
- Instrument cluster ground CKT open-no bias (CAV 5)
- CCD bus (-) CKT open-instrument cluster
- CCD bus(+) CKT open-instrument cluster
- CCD bus(+) CKT short to ground- instrument cluster
- CCD bus(-) CKT short to ground- instrument cluster
- Instrument cluster DEF ground CKT open