TM
5-5420-226-20-1
(
Symptom-69”
DETAILED
TROUBLESHOOTING
PROCEDURE
SUPPORT
SYSTEM
- VEHICLE
LIGHTING
FROM
STEP
(Continued)
o4
I
Check
frent accessory
harness
(CKT 514-515)
at
connector
to foot DIMMER
SWITCH
for electrical
power.
First Technician (Operator’s Station)
l Set MASTER
BATTERY
switch
OFF.
l Set B.O. SELECTOR
switch
to IR.
.
l Remove foot DIMMER
SWITCH
(page
10-169).
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 tocontacrC
(C KT514-5
15)
of front accessory
harness
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?
t
AO>
D-
fl
TO VEHICLE
GROUND
CONTACT
C
I
@
n
—--
——._
*
?
/’
Oo
Replace
foot DIMMER
SWITCH
(page
10-169).
FOOT DIMMER
SWITCH
..
TA107358
4-669
