MY UNDERSTANDING of electric steps that retract on engine start is step power comes from Coach battery thru a 12vdc- 25a breaker, and RETRACT signal is simply a smaller wire to the control board that senses IGN=ON. My OLD simple single step has no control board, and no auto retract. ALSO on ALTERNATOR POWER, most have a IGN=ON controlled SOLENOID that charges Coach Batteries when engine running. (Some) also have a BIM/ BATTERY MANAGER that is in the circuit, and can also charge chassis when plugged in, but feature usually only on higher $$ rigs?
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THenne1713
2000 Conquest LE 6266, Class-C on 99-E450SD, 6.8, 2v, V-10
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