code 18 for the PHP will only be active when the platform is raised high enough for the elevation limit switch to be activated and the pot hole bars (or switches/wiring) not activated. That is probably another issue.
Did the electric motor come on when a function was selected? (except platform Down)
Put the platform control switch to the Drive mode and select Steer Left or Right.
Does the electric pump motor start?
If not, let's get a voltmeter out and begin troubleshooting.
Willie asks for a serial number and it is a very important bit of information.
There have been significant upgrades throughout the years that will affect the troubleshooting procedure.
One thing that is common throughout the millenium though is that the DC Motor Controller will not
give a fault code when it goes bad.
If your DC Motor does not power up when a function is selected (except platform Down) then the
DC Motor Controller is the first place to begin troubleshooting.
The DC Motor Controller is the component that sends a pulsating DC Minus to the electric pump motor to turn
the motor to let the hydraulic pump generate oil flow.
The DC Motor Controller is the "black box with all the big wires on it". Except for the year we used the GE Motor Controllers.
They were silver/gray.
Check for 24 volts across terminals B+ and B-. It has to be there.
Check for 24 volts at the D terminal of the electric motor, it has to be there. (follow the wire from the B+ of the motor controller to the motor, this will be the D terminal)
If 24 volts is present across B+ and B- and at the motor also, it is time to check the input at the small wires on
the motor controller at terminals 1 and 3.
When Steer Left is selected (or Lift Up, Drive Forward or Reverse, or Steer Right) there should be a 24 volt
signal at terminal 1 and a signal of about 3 to 4 volts at terminal 3.
If these values are present when a function (all except Platform Down) is selected, then the Motor Controller
is suspect.
If the values are not there, then the ECM or the wiring from the ECM to the Motor Controller are suspect.
At this point, we will wait to hear from you if the electric motor turns on or not when Steer Right or Left is selected.
edit:
http://manuals.gogenielift.com/Parts And Service Manuals/START HERE.pdf
