TM 5-5420-226-20-1
SvmDtom-47
DETAILED
TROUBLESHOOTING
PROCEDURE
(
–..
T’
INDICATOR
- LAMP
(Continued)
<
1)
Check
master
control
panel
accessories
harness
(CKT 519), at connector
to HI BEAM indicator
lamp, for
electrical
power (6.0. service lamps).
I
Second Technician
(Operator’s
Station)
l Set MASTER BATTERY switch OFF.
l Turn LIGHTING CONTROL switch lever to B.0,
DRIVE.
l Set B.O. SELECTOR switch to IR.
l Dispiace master control panel (page IO-33).
l Disconnect master control panel accessories harness
connector
from HI BEAM inditator
lamp.
l Set muhimeter to measure 18 to 30 volts dc or use STE/
ICE Test No. 89. (page 4-81).
l Connect red probe of meter to one of the master control
paneI accessories harness connector contacts(CKT519)
at HI BEAM indicator lamp and black probe to ground.
l Set MASTER BATTERY switch ON.
l Check if meter indicates 18 to 30 volts dc.
l Press and release foot DIMMER SWITCH.
l Check if meter indicates 18 to 30 volts dc.
.
l Repeat above check on other contact of master control
panel accessories harness connector
(CKT 519) at HI
BEAM indicator
iamp.
Does meter indicate
18 to 30 volts dc at either
contact?
m
HI BEAM
TO VEHiCLE
GROUND
k
INDICATOR
1
LAMP
\m
~-i
l o
(CKT 519)
Replace high beam indicator
lamp assembly
(page 10-54).
TA107212
,
4-523
