STOPLIGHT DOES NOT WORK WHEN TRACTOR BRAKES ARE APPLIED - CONTINUED

TM 9-2320-270-20-1

TROUBLESHOOTING - CONTINUED

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 13.

Put blackout switch (3) switch lever in LIGHTS position. Using multimeter

set at 30 vdc, put red probe on wire no. 294 (5), and black probe to good

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

If meter reads no voltage, replace blackout switch (page 4-298).

Step 14.

At connector harness (6) for directional signal control, disconnect wire no.

294 (7) from red wire. Using multimeter set at 30 vdc, put red probe on wire no.

294 (7) 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.

Step 15.

Plug wire 294 into connector. At to connector harness (6) for directional signal

control, disconnect wires no. 003, A and B (8) from orange wire (9). Using

multimeter set at 30 vdc, put red probe on orange wire and black probe to good

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

If meter reads no voltage, replace directional signal control

TA239680

3-93