A strong magnet is not critical, most any medum-size magnet will suffice, IF the reed switch wire connections are not corroded.
Kwikee steps are always "hot", the controller turns the motor off/on and changes directions by switching the ground..
This explains everything:
Kwikee Product Service Training Manual
FWIW, Kwikee steps says to lubricate all moving joints monthly.
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2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA.
"We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution." Abraham Lincoln