Organizational Troubleshooting (continued)
TEST OR INSPECTION
If no continuity,
replace wire no.
If no continuity, replace indicated wire.
If all continuity checks good, reconnect harness connector P7
to control panel J7. Replace GCU and connect harness
connector P12 to GCU. Perform operational check.
DC VOLTS METER READS 0 (DC POWER ON INDICATOR LIT).
Check for voltage (+28 vdc) between + and - pins of dc output cable
connector. Shut down engine and disconnect battery.
If voltage at output cable, go to step 3.
If no voltage at output cable, do step 2.
Test dc contactor K2 (see malfunction 94).
b. If contactor tests good, check cable P3A4/0 between contactor
K2 and shunt R1 (see FO-5) for continuity. Replace cable if
access cover. Disconnect main harness connector P5 from control
panel connector J5. Check for continuity between the following