Parts such as the Switch: Switch Assy., Rr., Bulb, Controller,illumi, Bulb are included in the Civic Wagon 4wd 1985 (f) Wgn 4wd (ka,kl) Switch parts fiche.
The component with the lowest price in the SWITCH schematic is the Bulb/socket/wire.
The sub assemblies and components that make up this Switch include this Controller,illumi, the most expensive part.