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 386 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

81.

24-VOLT TRAILER BLACKOUT TAILLAMPS NOT WORKING (Continued).

14

Remove relay RY-2

(para 3-112), and go

to step 15.

15

Check for voltage at 24-volts dc

Install relay

Repair circuit

circuit 18A-TN ter-

nominal

RY-2 (para

18A-TN (para

minal of relay con-

3-112), and go

3-127) Install

nector

to step 16

relays

RY-2

and

connector, and

circuit breaker

bracket (para

3-112 and

3-114).

16

Remove relay RY-3

(para 3-112), and go

to step 17.

17

Check for voltage at 24-volts dc

Install relay

Repair circuit

circuit 18D-TN ter-

nominal

RY-3 (para

18D-TN (para

minal of relay con-

3-112), and go

3-127) Install

nector

to step 18

relays

RY-3

and

connector, and

circuit breaker

bracket (para

3-112 and

3-114).

2-260