REPAIR STEPS
SOLUTION
DIAGRAMS
PROBLEM
MI91.2232
26JUN98
Part 1
Part 2
REFER TO MP85.5043
REFER TO MP85.5043
REFER TO MP85.5120
Touch panel has
indicator lights on
with the ignition
switch off.
There should be no +12 power to the 7" control box. Trace the brown
or yellow wire in the 3 pin UML connector to its source. The wire should
be connected to accessory or ignition power. (Accessory power is pre-
ferred.)
With the ignition
switch on:
a. The green "TRAV-
EL" light nor the
master "JACKS
DOWN" warning
light is lit.
With the ignition switch on, the brown (or yellow) wire in the 3 pin UML
connector should have +12 power. If not, trace the wire to its source.
Check any in-line fuses. If +12 power is present, check the 5 amp ACC
fuse on the 7" control box. Check that the white wire in the 3 pin UML
b. The master "JACKS
DOWN" warning
light is on. (Jacks
are all in the stored
position.)
Push the "I" button one time. A red jacks down warning light on the
touch panel should come on, indicating a jack is down. Unplug the
jack pressure switch. If the red warning light goes out, the switch is
stuck and should be replaced. If not, unplug the jacks warning switch.
If the red warning light still does not go out, unplug the 4 wire MTA
connector for the warning switches at the 7" control box. If the red
warning light goes out, the wire to the jack warning switch is shorted
to ground. If the red warning light stays on, replace the 7" control box.
If no red warning light on the touch panel comes on, check the wires
to the master warning light. If the wires are ok, replace the 7" control
box.
REFER TO MP85.5115
REFER TO MP85.5110
REFER TO MP85.5043
c. The touch panel
has indicator lights
on other than the
green "TRAVEL"
indicator.
Turn the ignition switch off then back on. If the lights do not go out,
the 7" control box or the touch panel, is the problem.
WHITE GROUND
BROWN ACC
5 AMP
10 AMP
10 AMP
5 AMP
ACC FUSE
5 AMP
10 AMP
10 AMP
YELLOW IGN
(WHEN APPLICABLE)
5 AMP
WHITE GROUND
BROWN ACC
5 AMP
10 AMP
5 AMP
10 AMP
10 AMP
(WHEN APPLICABLE)
YELLOW IGN
ACC FUSE
10 AMP
MASTER WARNING
LIGHT
POSITIVE
VOLTAGE
LF WHITE
RF RED
RR BLACK
LR GRN
JACK WARNING/
PRESSURE SWITCH
INPUTS
connector is properly grounded. Check that the modular cable is cor-
rectly plugged into the touch panel. If it is ok, the problem is the 7"
control box.