Organizational Troubleshooting (continued)
TEST OR INSPECTION
If bulbs were good, do step 5.
Test PANEL LIGHTS switch 1S6 (see malfunction 79).
If switch test was good, do step 6.
Check wire L6B20N between right panel lamp socket negative terminal,
If wire is good, do step 7.
Disconnect main harness connector P8 from lower tray connector J8.
Check wire L3C20 between P8-T and right panel lamp socket positive
Replace defective wire. Reconnect connector, and perform
Set MASTER SWITCH to OFF and disconnect battery. Test PANEL LIGHTS
switch 1S6 (see malfunction 79).
If switch is good, do step 9.
Check voltage regulator 3VR1 and wiring as follows:
a. Open electrical trays access door and extend lower electrical
or equivalent) on Xl scale, measure resistance between
either of two pins (10). If resistance is greater than 25
If resistance is less than 25 ohms
(regulator good), check wiring per step b.