Hi Keith,check out the microswitch on the frame of the step,this switches the "buzzerd" to earth.If yours is alater van it may have a plunger-type switch in the cover of the motor,they do break.Also corrosion can cause the earth contact to the chassis to insulate itself.
Good luck,Stuart.
Stuart
May 2010
the step on what?
BOB
May 2010
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