TM 9-2350-247-20-1
BLACKOUT STOPLIGHT DOES NOT WORK—Continued
0039 00
8Y
1. Connect circuits 75 and 75A on stoplight switch.
2. Remove circuit 22 plug (1) from jack on left taillight, or circuit 23
plug (1) from jack on right taillight.
3. Turn main light selector switch lever on light switch to BO
MARKER.
4. Measure voltage between circuit 22 (left) plug (1) or circuit 23
(right) plug (1) and ground with both steering levers locked in
parking brake position. Reading should be less than 17 volts.
5. Is reading correct?
YES
NO
8YN
1. Install circuit plugs 22 (1) and 23 (1)
on left and right taillights.
2. Replace service stop or BO stoplight
bulb (WP 0278 00).
3. Verify no faults found.
9Y
1. Partially remove instrument panel (WP 0256 00).
2. Disconnect wiring harness connector from light select switch.
3. Place light panel switches in BO MARKER and PANEL BRT
positions (see your -10).
4. Measure resistance between pins (1) (F, A),(F, B), and (F, E).
Multimeter should show continuity.
5. Measure resistance between pins (1) (F, C),(F, D), (F, J),(F, H),(F,
K), (F, L),(F, M), and (F, N). Multimeter should show infinity.
6. Move auxiliary switch to PARK (see your -10). Measure
resistance between pins (1) F and L. Multimeter should show
infinity.
7. Measure resistance between pins (1) K and N. Multimeter should
show continuity.
8. Are readings correct?
YES
NO
9YN
1. Replace light switch (WP 0262 00).
2. Verify no faults found.
0039 00-5
