TM
5-5420-226-20-1
Symptom-66
DETAILED
TROUBLESHOOTING
PROCEDURE
FROM
STEP
SUPPORT
SYSTEM
- VEHICLE
LIGHTING
B
o
(Continued)
13
h
.
I
Check
dual headlight
base harness
connector
(CKT
I
17) 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
B (CKT
17) of
dual headlight
base harness
connector
and black probe
to ground.
First
Technician
(Operator’s
Station)
l Set MASTER
BATTERY
switch
to ON.
Second
Technician
(Front
of Vehicle)
l Check if meter indicates
18 to 30 volts dc.
/
Does meter
indicate
18 to 30 volts dc?
m
u
TO VEHICLE
GROUND
Q
—
—
—@
.——.
CONTACT
B
(CKT
17)
DUAL
BASE
(
HARNESS
CONNECTOR
O@
0=OF
*O‘o
Eo
(y= 00
Replace
bad headlight
assembly
(page
10-172).
TA107339
4-650
