TM 10-3930-675-24-1
TROUBLESHOOTING PROCEDURES (NON-ERROR CODE) - CONTINUED
0007 00
Table 2. Electrical Troubleshooting Procedures (Non-Error Code) - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. Blackout Drive and Marker Lights Do Not
b. If any breaker does not reset,
Operate When Switch is Turned On -
use the wiring diagram to
Continued.
check circuit for short to
ground (WP 0048 00-41).
Replace any shorted or
grounded harnesses (WP 0113
00).
c. Replace damaged or faulty
circuit breaker (WP 0074 00).
3. Inspect blackout drive and a. Replace burned out lamps
marker lights for damage or
(WP 0087 00).
burned out lamps.
b. Replace damaged blackout
lights (WP 0087 00).
4. Check blackout drive and Repair or replace damaged
marker light wiring harnesses harnesses or connectors (WP
and connectors for damage.
0113 00).
5. Check voltage (24V) at X7 pin a. If no voltage (24V) is found,
9 and 6 with the blackout drive
remove blackout drive/marker
marker light switch turned on.
switch from the instrument
panel and check for continuity.
b. Replace damaged or faulty
switch (WP 0073 00).
c. If switch is good, use the
wiring diagram to check the
continuity of the wires A79,
79, 76 and A76, (WP 0048 00-
43).
d. Repair or replace damaged
wires or connectors (WP 0113
00).
6. Check voltage (24V) at X11 a. If no voltage found, check
pin 3, X11 pin 9, X12 pin 1,
continuity of wires A113,
X14 pin 1, and X15 pin 1 with
A153, A119, A121, and A141
the blackout drive marker light
(WP 0048 00-43).
switch turned on.
b. Repair or replace damaged
wires or connectors (WP 0113
00).
0007 00-28
