STOPLIGHT DOES NOT WORK WHEN TRACTOR BRAKES ARE APPLIED - CONTINUED

TM 9-2320-270-20-1

TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

33. STOPLIGHT DOES NOT WORK WHEN TRACTOR BRAKES ARE APPLIED - CONTINUED.

Disconnect firewall harness connector (1). Using multimeter set at 30 vdc,

Step 11.

put red probe on pin W (2) and black probe to good ground. While assistant

applies brakes, take the reading, and release brakes.

If meter reads no voltage, close left side of hood (TM 9-2320-270-10)

and instrument panel (page 4-244) and notify direct support

maintenance.

Connect firewall harness connector (1), and close left side of hood (TM 9-

Step 12.

2320-270-10). At blackout switch (3) inside instrument panel. Using mul-

timeter set at 30 vdc, put red probe on wire no. 005 (4), and black probe to good

ground. While assistant applies brakes, take reading, and release brakes.

If meter reads no voltage, close instrument panel (page 4-244) and no-

tify direct support maintenance.

TA239679

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