TM 9-2320-273-20
4
5
Table 5-7. Instruments and Indicators Circuit Troubleshooting (Continued).
INSTRUCTION
INDICATION
TACHOGRAPH CLOCK IS INOPERATIVE.
Check circuit 59 using 12 volts dc nominal.
a multi meter.
Check wiring. Refer to
diagram and schematic
in Appendix D.
lNDICATOR/lLLUMINATION
LAMP
OUT.
Pull headlamp switch
out.
Check for voltage at
the headlamp switch
using a multimeter.
Check wiring to head-
lamp switch. Refer to
wire diagram and
schematic in Appendix
D.
For individual lamps
that are out, replace
bulb. Turn on head-
lamp switch.
Check wiring. Refer to
wire diagram and sche-
matic in Appendix D.
All lamps come on with
headlamp switch at
full out or half way
position.
12 volts dc nominal.
Lamp comes on.
YES
Replace
tachograph
para 5-66)
Go to Step 4
Replace
headlamp
switch
para 5-62).
NO
Go to
Step 2.
Go to
Step 2.
Go to
Step 3.
5-44
REMARKS
