TM
5-5420-226-20-1
Svm~tom-66
DETAILED
TROUBLESHOOTING
PROCEDURE
.
.
T
SUPPORT
SYSTEM
- VEHICLE
LIGHTING
(Continued)
h
Check
dual headlight
base harness
(CKT
18)
connector
at bad service
headlight
for electrical
power.
\
First
Technician
(Operator’s
Station)
l Set MASTER
BATTERY
switch
OFF.
Second
Technician
(Front
of Vehicle)
l Remove headlight
assembly
of bad service
lamp
(page
10-
172).
‘ l
Set multimeter
to measure
18 to 30 volts dc, or use STE/
ICE Test
No.
89 (page
4-81).
l Connect red probe of meter to contact A (CKT
18) of
dual headlight
base harness
connector
and black probe
to ground.
First
Technician
(Operator’s
Station)
l Set MASTER
BATTERY
switch
ON.
Second
Technician
(Front
of Vehicle)
l Check if meter indicates
18 to 30 volts dc.
Does meter
indicate
18 to 30 volts?
\
m
o-
7t
+0
TO VEHICLE
GROUND
DUAL
BASE
HARNESS
CONNECTOR
Replace
bad headlight
assembly
(page
10-172).
f
TA107337
4-648
