Tests AD

PINPOINT TEST AD: THE INSTRUMENT CLUSTER IS INOPERATIVE

Test AD1-AD3:

Test AD3-AD4:

Normal Operation
With the key in the START/RUN position, the instrument cluster receives power from the SJB fuse 19 (5A) on circuit 1112 (WH/LB), and fuse 16 (5A) circuit 640 (RD/YE). The B+ keep alive memory (KAM) power is through the SJB fuse 8 (10A) on circuit 1001 (WH/YE). The instrument cluster grounding is accomplished through circuits 1203 (BK/LB) and 1205 (BK).

Possible Causes
- circuit 640 (RD/YE) open or short to ground
- circuit 1001 (WH/YE) open or short to ground
- circuit 1112 (WH/LB) open or short to ground
- circuit 1203 (BK/LB) open
- circuit 1205 (BK) open
- instrument cluster