TM
5-5420-226-20-1
Symptom-57
DETAILED
TROUBLESHOOTING
PROCEDURE
T
SUPPORT
SYSTEM
- VEHICLE
LIGHTING
(Continued)
.
Check
lead
from
variabie
resistor
at
domeiight
connector
for electrical
power.
Technician
(Operator’s
Station)
l Set MASTER
BATTERY
switch
OFF.
l Set NIGHT
VISIC!N
switch
OFF.
l Disconnect
variable
resistor
lead
connector
from
domelight
connector.
l Set multimeter
to measure
18 to 30 voits dc, or use STE/
ICE Test
No.
89 (page
4-81).
l Connect red probe of meter to center contact of variable
resistor
lead connector
and black
probe
to ground.
l Set MASTER
BATTERY
switch
ON.
l Check if meter indicates
18 to 30 volts dc.
Does meter indicate
18 to 30 volts dc?
m
Replace
operator’s
domellght
I(page 10-191).
FOR CLARITY
QUADRANT
ASSEMBLIES
NOT SHOWN
1
I >“
vi’ G7.4?
“AR~BLE
OPERATOR’S
DOMELIGHT
I
o-‘n-+0
TO VEHICLE
TA107279
4-590
