4 X 2 Gear Selector
31
6.14. If power is present at the second wire, that
means that a ground path has successfully been
created, and the vacuum solenoid should be
open. See Figure 6.14.
6.15. If power and vacuum are present at the vacuum
solenoid, but vacuum is not being passed to the
port that leads to the vacuum actuator, replace
the vacuum solenoid.
NOTE: The solenoid can be double-checked by
substitution before replacement.
6.16. If the F-N-R lights on the instrument flash when
any of the gear selector buttons are pushed,
even after manually returning the shift wedge to
neutral, check the neutral switch.
See Figure 6.16.
Figure 6.14
Vacuum test at the
solenoid should
correspond with the
results of the
electrical test
Figure 6.16
Red wire with
white trace:
voltage present
in neutral
6.17. The red wire with white trace wire will show
power when the roller on the neutral switch is in
the detent in the shift wedge.
DIFFERENTIAL LOCK
6.18. With the hood open to gain access the back side
of the differential lock button, some tests can be
made at the button. See Figure 6.18.
6.19. The green wire provides a ground for the
bulb in the button that lights when the differen-
tial lock is engaged. If the differential lock works
normally, but the button does not light-up when it
is engaged, check this connection for continuity
to ground.
6.20. The orange wire should be hot whenever the
key switch is turned on.
6.21. The yellow wire with white trace should be hot
with the key on and the differential lock
engaged. The small branch off of that wire pro-
vides current to light-up the button when the dif-
ferential lock is engaged.
Figure 6.18
Differential lock button
Power to lamp
in button and
to solenoid
Ground
(green)
Hot lead
(orange)
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