LW4000 Left limit on width measure - X22 with VT ?

[bandali]

Getting "Left limit on width measure" error. This is during startup, when arm goes past the front to measure.
Festoon is new (1 month old), replaced X30 (worn out) and the rusted pickets in the bridge.
The wiring from J2-J3-J4 for the X22 is all disconnected, so it seems the big X22 sensor is not used.
Since I have VT, I'm trying to figure out how the X22 signal comes on then ?
Previous posts suggested checking X24 (left limit) as well. Anything else?

 

[MDrost1]

Have you swapped the left limit switch yet? I'd start there. Also, do you run a separate sheilded cable for your x30? New festoon or no, this will greatly increase the reliability of your x30 count.