ILP 25/33
Owner’s Manual
Rev.1.4
27
8.3
Liftgate does not Lift Up
1.
Visually check the valves at cylinders for mechanical damage such as bent or broken valves.
2. Jump female end of cable #2 to small small positive connector on motor solenoid
Do NOT stay between platform and truck body, gate will raise up
3. Gate is raising up
– Check toggle switch harness and gray wire haness to switch for damaged spots.
4. If gate does not raise up:
a. Check the motor solenoid for proper function and listen for clicking.
- No clicking = Motor solenoid or thermo switch at motor is bad.
- Clicking = Check for voltage on both big positive studs to ground. If voltage is
present the solenoid is ok. If not, the solenoid is not connecting internally and is bad.
b. Motor Solenoid is ok:
- Check for power on large positive motor stud.
- If no power is present, either the motor or the brushes are bad. If there is no power
at the motor stud, check the connection to the solenoid.
If gate is still not working, take truck/trailer and gate to an authorized repair station
30 Ft. x 2 ga.
Battery Cable
150 amp
Circuit Breaker
12V Power Supply
MBB Germany Cable # 3273863
Spade Connectors
with housing
Yellow/Green - Ground
Brown - Power
Blue - Load
Brown - Power
Blue - Load
Yellow/Green - Ground
ON/OFF Switch
Truck Installation
P
o
w
e
r
-
#
4
-
B
lu
e
S
ta
rt
e
r
-
#
5
-
B
ro
w
n
L
o
w
e
r
-
#
6
-
Y
e
llo
w
/G
re
e
n
7
0
-0
3
1
2
-0
0
2
Y
e
llo
w
/G
re
e
n
-
G
ro
u
n
d
Toggle Switch
Power
Load
Ground
Lower Valve(s)
at Cylinders
Power - #4 Green
Lower - #6 Yellow
Starter - #5 Red
2-Button
Hand Held Remote
(Optional)
Piggy back with
Toggle Switch
ON/OFF Switch
Trailer Installation
Brown - Power
Blue - Load
OR
OR
Ground
Power
Starter
Solenoid
1
5
A
F
u
se
Cable #6
Cable #2
Gray
3 Wire Harness
Large
Positive
Connector
Cable #5
Small
Positive
Connector
Down
Raise
