APPARENT HYDRAULIC DIAGNOSTIC CENTER (HDC) SYSTEM PROBLEM - Continued
Perform continuity test and check for short circuit to cable (connector case/shell) for two pins/wires in
W4 cable that go from either connector W4P2 or W4P3 (as applicable), normally connected to HDC
control box, to W4P5 or W4P6 connector (as applicable) normally connected to umbilical disconnect
bracket (Figures 33 and 34).
Does an open circuit or short circuit exist for umbilical cable assembly W4 wiring circuit (CIRCUIT FAULT
YES - Replace umbilical cable assembly W4. Resume HDC system functional check-out (WP 0025) .
NO - Go to Step (40).