ILK

With proper care and safe operation, your liftgate will provide reliable service for years to come. Production of all liftgates starts with using the best available components designed for years of hard labor.

Your liftgate is built to last. Every model begins with high-quality components engineered for strength and endurance, ensuring it can handle demanding workloads day after day. With proper maintenance and safe operation, you’ll enjoy reliable performance for years to come.

• Cross both large posts on the motor solenoid with the bar or screwdriver, making the motor run. This should make the platform lift, and once the platform is at floor level, keep the motor solenoid jumped (motor running), pushing down on the pin inside the S5 valve to make the platform close.

How to Temporarily Bypass Motor Thermo Switch

Before doing 10-10 test :

1. Shut off the truck engine
2. Unhook the charge coil from the tractor
3. Shut off the battery charger
4. Disconnect any outside battery source

Confirming battery voltage with 10 -10 test :

1. Using a multimeter, set on DC voltage
2. Attach the volt meter negative to the negative post on the motor
3. Attach the volt meter positive to the positive post on the motor
4. Using the lift switch, raise the platform to bed level
5. Keeping the switch activated, deadhead the motor
6. Keep the switch activated for ten (10) seconds and observe the multimeter reading

• Ten ( 10 ) volts for ten (10 ) seconds is the desired result
  • If the reading is less than eight ( 8) volts, the batteries are low and need to be charged
• Retest after charging
  • Replace batteries and check all connections and grounds if you cannot get 10 -10

Note: While doing the 10-10 test,  other lift gate movements will indicate a hydraulic problem 

Do You Hear Solenoids Clicking

1. Check the circuit breaker at the batteries
2. Go to "Motor Not Running"

Hear No Solenoids Clicking

1. Check fuses at pc board
2. Check for bad switches
3. Check for bad motor solenoid
4. EQUALS Bad solenoid valve 

1. Jump across large posts on motor solenoid
   • If the motor runs, test for incoming signal on the small terminal and ground on the other small terminal
   • Test the thermo switch in the motor for continuity if the signals are good, replace the motor solenoid
2. Jump across large posts on  motor solenoid
   • If the motor does not run, jump the motor directly with jumper cables from a separate good battery
   • If the motor is not running, tap on the motor; if the motor runs, the brushes are bad
   • If the motor runs, check the motor ground and power to the motor solenoid

Truck: Turn on the cab switch

Trailer: Turn on the switch at the liftgate

• Check the fuse, and circuit breaker at the battery
• Check fuses at the PC board
• Unplug these 3 connections on the PC board:
  • J-31 Hand Control
  • J-3 Warning Lights
  • J-41 x 2 B-13 and B-15 sensors
• M control—check fault codes
  • Clear the code: unplug J-11 and J-1 then plug back in
• Remove the J-30 plug, confirm #4 pin has voltage, jump #4 to the next 4 pins to get up, down, tilt down, tilt up, note last pin is ground do not touch with the jumper on the J-4 pin

Fault Codes

• #1: Liftgate On
• #0: Liftgate Off
• #2: Low Voltage
• #8: Short
• #5: B-15 Problem
• #3: B-13 Problem

Emergency Operation: #E mode—emergency by-pass of sensors

• Turn and hold both down and tilt down knobs for 10 seconds until E code is shown
• Operate liftgate in E mode
• To reset turn the liftgate OFF and then ON

Motor not running: see section above

S-1 and S-2 valves on lift cylinders not opening

S-5 valve on the motor not energizing along with the motor

S-3 and S-4 valves on lift cylinders not opening

Activate the Foot Controls in the sequence depicted on the plate riveted to the platform.

• If activating the UP function, check the voltage at the 5 Pin; the reading should be 10V or more.
• If activating the DOWN function, check the voltage at the 6 Pin; the reading should be 10V or more.
• If activating the UP or DOWN function by jumping at the J-3 Plug, both 4 and 5 or 6 Pins must have power from the 4 Pin as an example: To activate the UP function, jump from 4 Pin (next to the 5 Pin) to 5 Pin, then within 3 seconds jump to 6 Pin while still having the jumper on the 4 and 5 Pins. Reverse the process for the DOWN function using the 4 Pin next to the 6 Pin. Inspect cables for continuity, pinches, insulation compromise, and other conditions that could cause a short in the circuit if the liftgate won't function. Replace foot switch(s) if defects are found.
• Remember, proper voltage is key for the correct function of this feature. Other components are also being activated and require proper voltage. Low voltage may cause one function to not properly respond, causing the liftgate not to operate as desired.

• First, add a 12-volt power supply direct to the batteries
• Second, move the 12-volt power supply directly to the motor solenoid and ground it on the motor
• Adjust PSI to 3000 PSI
• Change the hydraulic fluid to fluid ISO 32