SkyTrak 8042 Service Manual - Manual (Page 821)

Electrical System
9.230 Model 8042, 10042, 10054 Legacy Rev. 10/03
a. Travel Select Lever and Wiring Harness Testing
Note: An assistant will be required to operate the travel
select lever, in order to perform the following test.
1. Remove the plug from the UPPER (1 and 3) and
LOWER (2 and 5) transmission solenoid valve
bodies. Turn the ignition key switch to the RUN
position.
Note: In order to perform the solenoid test, the park
brake switch must be in the OFF position.
2. Have an assistant place the travel select lever in the
position that is not functioning correctly.
3. Check the harness side pin connections with a DMM
for battery voltage corresponding to the direction
and gear that has been selected. Refer to the chart
that follows. Place the negative (-) lead on pin 7
(ground) (4 or 6) and the positive (+) lead on the pin
to be tested; test for battery voltage.
If battery voltage is not present on any of the pins
that have been tested, the wiring harness is suspect
and should be replaced.
If battery voltage is present, the harness is
functioning properly.
Note: The following chart shows which solenoids are
active with any given selection of the transmission shift
control switch (travel select lever) and gear select position.
MA7720
1
2
MT1110
Y1
Y2
Y3
3
4
Upper Valve
Body
Lower Valve
Body
Driving
Direction
Speed Y1 Y2 Y3 Y4 Y5 Y6
Forward 1 • • • •
Forward 2 • • • •
Forward 3 • • • •
Forward 4 • • •
Reverse 1 • • • •
Reverse 2 • • • •
Reverse 3 • • • •
MT1120
Y4
Y5
Y6
5
6