GENERAL
-
How to Diagnose
2. SHORT-CIRCUITS CHECK
A blown fuse indicates that a circuit is shorted. The circuit responsible can be determined by the
following procedures.
Remove the blown fuse and connect a test light in its place
(Switch is in the OFF position)
Test light comes on
+
NO
1
Short circuit between fuse block and switch (A)
Turn on the switch
(Test light comes on but the illumination light does not come on)
I
t
Disconnect the illumination light connector
I
+
Test light remains on
i
NO
Short circuit between the illumination light connector and illumina-
tion liaht ((3
Short circuit between the switch and illumination
light connector (B)
A
Power supply
(Remove the fuse.)
1
OFF
g
i
location
Switch
a
Illumination
fight
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B
Power supply
Fuse block
(Remove
the fuse.)
*
Disconnect the load
iii
Illumination
light
T
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1
3. CONTINUITY CHECK
Self powertest light
(or ohmmeter)
Z16AO269
C
Power supply
Test
light
Fuse block
(Remove the fuse.)
Switch
Disconnect the load
ii
Short-circuit
-
location
Illumination
light
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(1) When the switch is in the OFF position, the self power
test light should come on or the ohmmeter should
read 0 ohm only when the terminals 1 and 2 are inter-
connected.
(2) When the switch is in the ON position, the self power
test light should come on or the ohmmeter should
read 0 ohm only when the terminals 3 and 4 are inter-
connected.
TSB
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