INSTRUMENTATION
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 4D-17
Audio Warning Test and Panel Light Switch
The switch provided for the audio warning test and panel (dash) lights is a three-position
toggle switch. It must be wired and installed correctly to provide proper operation of the
systems.
REMOVAL
1. Remove hex nut retaining switch to Engine System Monitor Panel.
2. Remove wires from back of switch.
TESTING
1. With switch lever toggled DOWN to its spring loaded AUDIO TEST position continuity
should exist between terminal numbers 1 and 2 (as indicated by decals). If no continuity
exists, replace switch.
2. With switch lever toggled UP to the panel light ON position, continuity should exist
between terminal numbers 4 and 5 as indicated by decals. If no continuity exists, replace
switch.
73369
87-805675
UP
123
UP
a
b
c
d
1
2
3
4
5
6
a-Audio Test/Panel Light Switch
b-Spring-Loaded Audio Test Portion (Direction of Movement DOWN When
Installed)
c-Terminal Number
d-Terminal
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