Lippert Components Coach Step - Manual (Page 3)

WARNING!
With Power Switch “ON,” door open and steps extended, it is possible to drive off. Damage to steps or vehicle is possible, as well
as serious personal bodily injury or death.
STEP OPERATION - POWER “OFF”
1. With door open, steps extended and Power Switch turned “OFF,” steps remain extended; amber light shuts off.
2. If the steps are to be retracted with the door open, turn the power switch ON, retract the steps and turn power switch OFF. The steps will
remain retracted.
3. With door closed, steps extended and Power Switch “OFF,” turning the ignition “ON” will automatically retract steps.
4. When door is opened and ignition turned off, steps will extend one last time - last man out feature.
5. If door is opened and closed without full extension of the steps, the steps will retract and stay until Power Switch is turned “ON” and door
reopened.
NOTE: If step’s full extension is impeded by an external object like a curb, steps will cease operation and shut down. Steps will retract normally.
TROUBLESHOOTING
WARNING!
Steps must always be operated with a fully charged battery. Because the steps can detect obstacles in the way of operation by
sensing excessive amperage, a fully charged battery is imperative. Any drop in voltage will cause the steps to malfunction.
WARNING!
With Power Switch “ON,” door open and steps extended, it is possible to drive off. Damage to steps or vehicle is possible, as well
as serious personal bodily injury or death.
WARNING!
Due to the fact that the step detects obstacles by sensing excessive current draw, it is imperative that the step be tested with a fully
charged battery and test wires be at least 12 GA. Do not attempt to test the steps using a battery charger or bench type power
supply. Even though they may supply a full 12VDC, a momentary drop in the supply may fool the module into thinking that the
steps have encountered an obstacle.If using a battery to test the steps, care should be taken to connect jumpers to the battery
first and then to the steps. Battery acid can cause injury and automotive type batteries under load can produce hydrogen gas.
They may explode if shorted out or if a spark ignites the hydrogen gas when the battery is connected to a load.
WARNING!
No repairs should be attempted by anyone other than a qualified professional as the deployment or retraction of the steps can
cause injury if proper precautions are not taken.
TROUBLESHOOTING THE SYSTEM
1. Disconnect the plug between the chassis and the steps. Using a voltmeter, measure the voltage on the large red wire at the chassis
connector with the step switch in the “ON” position. The meter should indicate more than 12VDC. Turn the step switch to the “OFF” position
and the meter should not indicate voltage. If the meter indicated no voltage with the switch “ON”, check the circuit and the circuit protectors.
If it indicates less than 12VDC with the switch “ON”, charge the battery. If 12VDC are indicated on the red wire with the switch “OFF”, replace
the switch.
2. With the voltmeter, set to measure resistance, measure the resistance between the green wire in the plug and the frame of the vehicle. If there
is more than one ohm of resistance, clean the ground eye (ground lug) or relocate the ground wire.
3. Using a voltmeter, set to resistance, test for ground on the brown wire going to the door switch. The meter should indicate an open circuit
with the door closed and a path to the ground with the door open. Insure that the door is open at least 6 inches before it completes the circuit
to ground.
4. With a voltmeter, check for 12VDC on the yellow wire with the ignition switch in the “ON” position and no voltage with the switch in the “OFF”
position. If there is no voltage with the switch in the “ON” position, trace the circuit and repair.
5. Reconnect the steps to the chassis and proceed to test as follows. With step switch “ON” and the ignition key “OFF” open the entry door and
the steps should extend and the light should come on.
6. If the light comes on, but the steps do not deploy, remove the step assembly from the motor home.
7. Remove the two bolts that hold the step arm collars to the drive shaft. This will allow you to operate the steps manually. If the steps do not
operate freely, visually inspect for bent arms or tight joints. The shoulder bolts should rotate in the bushings with very little effort. Repair or
replace as needed.
8. If the step moves freely, unplug the module from the motor assembly at the two pin connector. Connect 12VDC from the battery to the yellow
wire going to the motor and ground the red wire. The gear should rotate in the deployment direction until it goes over center and comes to
rest against the stop. (If the steps were deployed, reverse the wires to drive the gear in the opposite direction). If the gear and motor
assembly will not function normally replace them, otherwise replace the module assembly.