TM 9-2350-247-20-1
SERVICE AND/OR BLACKOUT STOPLIGHTS MALFUNCTION—Continued
0038 00
3Y
1. Turn MASTER SWITCH OFF.
2. Remove main harness circuit 75A plug (1) from stoplight switch
jack (2).
3. Remove main harness circuit 75B plug (3) from stoplight switch
jack (4).
4. Measure resistance between switch jacks (2) and (4) with switch
depressed and with switch released.
5. Does multimeter read infinity with switch depressed and 0 ohms
with switch released?
YES
NO
3YN
1. Replace stoplight switch
(WP 0274 00).
2. Verify no faults found.
4Y
1. Install main harness circuit leads 75A and 75B on stoplight
switch.
2. Partially remove instrument panel (WP 0256 00).
3. Remove main harness plug (1) from light switch jack (2).
4. Measure resistance between main harness plug (1) pins K (3) and
A (4) with both steering levers locked in parking brake position.
5. Does multimeter read 0 ohms?
YES
NO
4YN
1. Faulty main harness circuit 75A and/
or 75B.
2. Notify your supervisor.
5Y
1. Replace light switch (WP 0262 00).
2. Verify no faults found.
0038 00-2
