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
6. Blackout Stoplights Not Working - Continued. 6. Check continuity, using the Replace damaged or open harness
wiring diagram, of the blackout or connectors (WP 0113 00).
drive marker light wiring
harnesses from XK13 pin 3 to
right and left blackout stoplights
includes
additional
connectors to the blackout
stoplights at the fender
brackets (X14A and X15A).
HORN, BACKUP ALARM, AND BACKUP
LIGHTS
7. Horn Will Not Sound When Button is Pressed. 1. Check position of blackout Place blackout drive/marker light
drive/marker light switch.
switch in OFF position.
2. Check circuit breaker F9 for Reset circuit breaker as required.
trip.
3. Inspect horn, connectors, and a. Test horn using 24V source.
wiring for damage.
b. Replace damaged horn (WP
0105 00).
c. Repair or replace damaged
harnesses or connectors (WP
0113 00).
4. Check voltage (24V) at X20 a. If no voltage (24V) is found at
pin 1 and 2 with the horn
X20 pin 1, check continuity of
switch depressed.
wire A201 (WP 0048 00-38).
b. If no voltage (24V) is found at
X20 pin 2, check accessory
control lever for damage and
continuity (WP 0048 00-40).
c. Replace damaged or faulty
accessory control lever (WP
0234 00).
0007 00-30
