TM 5-5420-226-20-1
TM
5-5420-226-20
(
(
DETAILED
TROUBLESHOOTING
PROCEDURE
SUPPORT
SYSTEM
- VEHICLE
LIGHTING
(Continued)
Symptom-59
T
/check
foot
DIMMER
SWITCH
(CKT
16) for internal
short.
I
Technician
(Operator’s
Station)
l
l
l
l
l
l
Set MASTER
BATTERY
switch
OFF.
Remove
foot DIMMER
SWITCH
(page
10-171).
Set multimeter
to OHMS
X 1 scale and “zero”
meter, or
use STE/ICE
Test
No. 91 (page
4-83).
Connect
red probe of meter
to contact
G (CKT
16) of
foot DIMMER
SWITCH
connector
and black probe to
case of foot DIMMER
SWITCH.
Operate
foot DIMMER
SWITCH
in both
HIGH
and
LOW
BEAM
positions.
Check
if meter
indicates
less than
infinite
resistance
in
either
foot DIMMER
SWITCH
position.
Does
meter
indicate
less
than
infinite
resistance,
I
thereby
indicating
a short?
Replace
LIGHTING
CONTROL
switch
(page
10-54).
I
-1
(
aYES
w
SWITCH
CASE
DIMMER
SWITCH
(LOCATED
NEAR DRIVER’S
LEFT FOOT)
Replace
foot
DIMMER
SWITCH
(page
10-171).
I
—
TA107289
4-600
