TM
5-5420-226-20-1
DETAILED
TROUBLESHOOTING
PROCEDURE
Symptom-67
SUPPORT
SYSTEM
- VEHICLE
LIGHTING
BOTH
HIGH
BEAM
AND/OR
BOTH
LOW
BEAM
SERVICE
LAMPS
WILL
NOT
LIGHT
(DIMMER
SWITCH
IN EITHER
POSITION).
This procedure
is to be performed
by
two
persons.
The
lead
person
is
referred
to as the first technician
and
shall direct the activity of the second
person called the second technician.
Check front accessory
harness
(CKT 16) at foot
DIMMER
SWITCH
for electrical
power.
1
Second
Technician
(Operator’s
Station)
l Set MASTER
BATTERY
switch
OFF.
l Remove foot DIMMER
SWITCH
(page
10-169).
l Disconnect
front accessory
harness
connector
from foot
DIMMER
SWITCH.
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 G (CKT
16) of
front
accessory
harness
connector
at foot DIMMER
SWITCH
and black
probe
to ground.
l Set LIGHTING
CONTROL
switch
to SER
DRIVE
and PANEL
light switch
to BRT,
l Set MASTER
BATTERY
switch
ON,
l Check if meter indicates
18 to 30 volts dc,
Does meter indicate
18 to 30 volts dc?
n
FOR CLARITY
QUADRANT
ASSEMBLIES
NOT SHOWN
M>
F
DIMME
(CKT 16)
l Check basket-light
switch
harnesa connector
(CKT 16) at
basket
disconnect
for
electrical
power.
l See Step @
.
r
TA107341
4-652
