WIRING HARNESS - Troubleshooting
8-19
Test
light
Power supply
Fuse block
(remove fuse)
r’TJ Switch
\
?
Illumination light
4,
1680241
Self power test light
Switch
ON
OFF
1680242
2. CHECKING SHORTCIRCUITS
(1) Remove the blown fuse connect the test light to the
disconnected terminal. The test light should not come
on.
(2) Connect a lead wire of the test light to the power side
of the connector 0. The test light should not come on.
(3) Connect a lead wire of the test light to the load side of
the connector 0. The test light should come on and the
load light should also come on.
(4) Disconnect the load at the connector 0 and connect
the test light lead wire to the load side of the connector
CD.
The test light should come on and the load light should
also come on.
(5) Connect the test light lead wire to the switch side of
the connecotr 0. The test light should come on.
(6) If the test conforms to any of the above conditions,
there is a shortcircuit in the wiring between the
connector 0 and the connector 0.
3. CHECKING CONTINUITY
(I) When the switch is in the OFF position, the self power
test light should come on or the ohmmeter should read
0 R only when the terminals 2 and 3 are interconnect-
ed.
(2) When the switch is in the ON position, the self power
test light should come on or the ohmmeter should read
0 LR only when the terminals 1 and 4 are interconnect-
ed.
) STB Revision
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