TM 9-2350-230-12
TABLE 8-16. VEHICLE DRIVING LIGHT CIRCUITS (FIG. 8-13) - CONTINUED
CIRCUIT
TEST POINTS
COMPONENT
NUMBER
FROM
TO
(ohms)
CIRCUIT
REMARKS
CAUTION: Disconnect battery positive and negative cables before making resistance or continuity tests.
I.R. headlight
427
P8-B
P4-E
0
From
dimmer
Infinity indicates open
switch,
leads from
P5-E
through harness, to
circuit or defective
dimmer switch
headlight base
leads.
for hi beam
I.R.. headlight
428
P8-A
P4-D
0
From
dimmer
Infinity indicates open
switch,
leads from
P5-D
through harness, to
circuit or defective
dimmer switch
headlight base
leads.
for lo beam
Headlight ground
40
P4-C
GND
0
From headlight
Infinity indicates open
leads
P5-C
bases to ground
circuit or defective
leads.
Headlight inter-
nal circuits -
both assemblies
are identical
Headlight ground
P4-C
Housing
0
Ground circuit
Infinity indicates open
through internal
circuit or defective
P5-C
Housing
wiring
leads.
I.R. headlight
P4-D
P4-C
1.
Through headlight
Infinity indicates open
lo beam
P5-D
P5-C
and bulb filament
circuit, defective lead
to ground
or burned out filament.
Zero OHMS indicates
short circuit.
L R. headlight
P4-E
P4-C
.5
Through headlight
Infinity indicates open
hi beam
P5-E
P5-C
and bulb filament to
circuit, defective lead
ground
or burned out filament.
Zero OHMS indicates
short circuit.
Service headlight
P4-B
P4-C
.5
Through headlight
Infinity indicates open
hi beam
P5-B
P5-C
and bulb filament
circuit, defective lead
to ground
or burned out filament,
Zero OHMS indicates
short circuit.
Service headlight
P4-A
P4-C
1.
Through headlight
Infinity indicates open
lo beam
P5-A
P5-C
and bulb filament
circuit, defective lead
to ground
or burned out filament.
Zero OHMS indicates
short circuit.
B. 0O. marker
P4-F
P4-C
30
Through headlight
Infinity indicates open
light
P5-F
P5-C
and bulb filament
circuit, defective lead
to ground
or burned out filament.
Zero OHMS indicates
short circuit.
B. 0. drive light
P4-G
P4-C
2.6
Through headlight
Infinity indicates open
and bulb filament
circuit defective lead
to ground
or burned out filament.
Zero OHMS indicates
short circuit.
8-74