Indicator Failure

Does not illuminate (prove out):
A. Connect EEC-IV 60-Pin Breakout Box to the HCU with ABS Adapter Cable.
B. Connect EEC-IV 60-Pin Breakout Box pin 1 (yellow indicator) or pin 4 (red indicator) to the ground pin.
C. Wiggle the wire harness at the several points between the HCU and the instrument cluster.
D. Repair/replace the wire harness at the location that the indicator flickered off for an open circuit.

Does illuminate (proves out):
A. Wiggle the wire harness at the several points between the HCU and the instrument cluster.
B. Repair/replace the wire harness at the location that the indicator flickered on for a short to ground.