the ideal is having the pasword and do the test according manual procedure. But, if not possible and taking the pertinent safety precautions
I suggest. you take 3 or 4 hr. to make a jumper cable(for testing purpouses)that interconect handle to VM,something like a "t"conector in hydraulics to test pressure. It will save you a lot of time when cheking pots and swuitches of handle.
I did one for a raymond truck, it is very helpfull for me.
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