TM-9-2320-283-20-1

TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1

TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3

DECEMBER 1983

TM-9-2320-283-20-1 - Page 289 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

53.

BOTH FRONT AND REAR TURN SIGNAL LAMPS NOT WORKING.

NOTE

Blackout toggle switch must be set to NORMAL position and turn signal switch

set to hazard position.

1.

Remove circuit breaker

bracket far enough to

access circuit breaker

CB-5 (para 3-114), and

go to step 2.

2.

Check for voltage at

circuit 35-LG terminal

12-volts dc

Install circuit

Reset circuit

of circuit breaker

nominal.

breaker bracket

breaker and/or

CB-5.

(para 3-114),

troubleshoot

and go to step

CB-5 circuit.

3.

(refer to mal-

function 34).

3.

Check for voltage at

12-volts dc

Go to step 4.

Replace circuit

circuit 35-LG terminal

nominal.

35-LG (para

of blackout toggle

3-127).

switch.

4.

Check for voltage at

12-volts dc

Go to step 5.

Replace black-

circuit 35A-PP terminal

nominal.

out toggle

of blackout toggle

switch (para

switch.

3-79).

5.

Disconnect circuit

35A-PP from flasher,

and go to step 6.

2-164