DISTRIBUTED BY:
For Trailer mounted lift gate applications Model #11050C00
To
Main
Battery
75
*
(refer to installation wire size table)
1. The Trail Charger should be mounted as close to the lift gate batteries as possible with the
indicator light pointing out for easy visibility. Mount the Trail Charger in a dry, well ventilated
area with no exposure to water spray, splash, runoff or immersion. Failure to do so may void
warranty. Spray protective coating on terminals and connections. Glyptal 1202 red enamel
insulating paint or similar recommended. Sure Power warranty does not cover corrosion related
issues. If possible locate in battery box. Protect terminals from corrosion.
2. The power wires should be routed and supported following the manufacturers harness keeping
all of the wiring protected.
3. Wire ties should be used to prevent wires from dangling. Keep slack to a minimum between
wires exiting the trailer, wire channel and the Trail Charger mounting location.
4. Use grommets or dome nuts anywhere wires pass through holes cut in any type of material.
Make sure wires are protected from abrasion.
TractorTrailer
Ignition
Switch
75 amp fuse (Sure Part PN# 1595)
Aux pin must be switched
by tractor ignition switch
To pin 7 of 7 way connector
75 Amp Fuse
Trail Charger
Connects to
tractor battery
1
Main
Battery
2
2 AWG
or larger
3
4
Liftgate
Switching
Circuit
Dual Pole
Connector
(refer to
installation
wire size table)
TractorTrailer
180154B
LITHO IN USA 02/09
Page 1
DISTRIBUTED BY:
For Trailer mounted lift gate applications Model #11050C00
Indicator Light
75amp Fuse
Installation Wire Size:
(Proper installation requires a minimum run length of wire on the input terminal. Use no less than
10ft of 10AWG wire. Use 16 AWG for ignition wire and 2 AWG from output to liftgate battery. (Keep output wire length short)
Input & Ground Wire Length
10 - 19 ft.
10
20 - 29 Ft.
30 - 39 Ft.
40 - 49 Ft.
50 - 59 Ft.
≥ 60 Ft.
8
6
4
Troubleshooting
Standard
size M8
Wire Gauge
1
2
3
1/4” quick
connect
terminal
size
4
4
2
Indicator
Light
Term.1
Output
Term.2
Input
Term.3
GND
Term.4
IGN
To verify that the cables are all connected correctly and the unit is operating normally, we will make some voltage
measurements.
First on our list is the Input terminal relative to the ground terminal. With a commonly available voltmeter,
connect the negative lead of the meter to terminal 3, the ground terminal. The negative lead will remain on
terminal three throughout the remainder of the following tests. Now, connect the positive lead of the voltmeter to
terminal 2. Observe the input voltage on the voltmeter and ensure it is reading greater than 11Vdc.
Next is the Ignition, terminal 4. With the ignition switch on, verify the ignition terminal is reading positive battery
potential, similar to what is seen on the Input terminal 2.
Finally, we measure the output, terminal 1. The output voltage is normally higher than the input voltage. Typical
output voltage at 25ºC is 14.2Vdc. Cold readings are typically higher and hot readings are typically lower.
If the indicator light is on, that indicates current is now flowing through the output terminal. If the indicator is not
on, that does not mean the unit is not functioning, it simply means no charge current is flowing on the output.
If the load current on the liftgate battery is high, the LED may blink on and off periodically. This is normal. In any
case, if the output, terminal 1 voltage is measured to be less than the input, terminal 2 voltage by greater than
0.1 Volts, it is normal to see this mode of operation, where the indicator blinks on and off.
Whenever the ignition terminal is less than 7Vdc, you should expect the indicator to remain off.
180154B
LITHO IN USA 02/09
Page 2