The easiest way test the height switches is using the analyzer menu or testing across the wiring. All 3 height switches are located under the floorboard. 118 is on the left, 84 in the middle and 20 on the right. You can test them directly there. They are activated by rollers touching the outer mast.
It is possible there could be an issue with the mast cable but with it protected inside the mast it is very unlikely. Plus the access 4 which controls the height switches is located on the platform with the switches.
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