Organizational Troubleshooting (continued)
TEST OR INSPECTION
Disconnect main harness connector P9 from lower tray connector J9.
Check wire L5C20 between P9-B and engine oil utility lamp socket (47,
Replace defective wire, and perform operational check.
Set MASTER SWITCH to OFF and disconnect battery. Test UTILITY LIGHTS
switch 1S7 (see malfunction 79).
If switch test was good, do step 7.
Check voltage regulator 3VR2 and wiring as follows:
a. Open electrical trays access door and extend lower electrical
or equivalent) on X1 scale, measure resistance between
either of two pins (10). If resistance is greater than 25
ohms, replace regulator 3VR2 (paragraph 4-371, and perform
If resistance is less than 25 ohms
(regulator good), check wiring per step b.
Remove battery charger access cover. Disconnect main harness
connector P6 from control panel connector J6, and disconnect
harness connector P9 from lower tray connector J9. Check for
If no continuity,
replace wire no.
Replace open wire. After replacement, reconnect all
connectors, and perform operational check.