0011
TM 1-1740-221-13&P&P
CHASSIS ELECTRICAL TROUBLESHOOTING - (CONTINUED)
DECISION
YES Replace work light lamps (WP 0118).
NO Proceed to Step 2.
MALFUNCTION - BRANCH 2.
MALFUNCTION - 12 volts are not present.
ACTION
2. Replace work light switch (WP 0120), or repair faulty wiring (FO-1, Line 73).
END OF TEST
TROUBLESHOOTING PROCEDURE
REVERSE/WORKLGHTS INOPERATIVE (GEAR SELECTOR IN REVERSE)
BRANCH 1.
1.
Ohms test diode REC1 (WP 0120) for proper operation.
CONDITION/INDICATION
Ohms test satisfactory?
DECISION
YES Repair faulty circuit wiring (FO-1, Line 72).
NO Procceed to Step 2.
MALFUNCTION - BRANCH 2.
MALFUNCTION - Ohms did not test satisfactory.
ACTION
2. Replace diode REC1 (WP 0120).
END OF TEST
TROUBLESHOOTING PROCEDURE
BACKUP ALARM (WARNING HORN) INOPERATIVE (GEAR SELECTOR IN REVERSE)
BRANCH 1.
1.
Chock Wheels. With gear selector in reverse, hand brake released, test for 12 volts at wire 66 (FO-1, Line 72)
on the backup alarm (WP 0119).
CONDITION/INDICATION
Is 12 volts present?
DECISION
YES Replace backup alarm (WP 0119).
00116
