It sounds like the circuits for the Kwikee step on your 2004 Winnebago Adventurer 35U are normally closed. The Replacement Motor with Table for Kwikee 25 Series Electric RV Steps # LC379804 does require normally open circuits. These are typically always black like those from the list below. Your circuits most likely will be white but do know that different manufacturers do not always accept the color standards so you can check your wiring to determine if they are an open or closed circuit.... view full answer...
Has the motor gotten any slower or seem like it's straining at all? When an electrical motor starts to fail it begins drawing more amperage than normal which can easily cause fuses to blow. Other than that it is probably wiring like you mentioned. view full answer...