Thanks for the reply.
My LEV was installed in 2011 and has an Allen-Bradley PLC controller. I don't know if this was how it shipped then or a later retrofit, but that's a decent controller.
I do understand the reluctance to give out information to people who don't know what they are doing. It reminds me of the Dunning-Kruger effect -- when a person's lack of knowledge and skills in a certain area cause them to overestimate their own competence. You have to plan and consider what can go wrong before you do work like this. I am cautious as required. Respect for what can happen is important to keep from getting hurt. I've done a lot of work under cars on jack stands and a lot of mechanical and computer and electronics work over my lifetime. I have a very good ability for understanding how things work and fixing things. I do not get under the cab unless there is something there to stop it from coming down on me if something happened. My house is only two stories, so falling down the shaft isn't really a concern.
