On my 1998 Galaxy 25S just on the left as you get in the rear side door are 3 brown toggle switches and a 240V plug. The first operates the centre roof light, the second the 2 entrance roof lights but what is the third for? Mine does nothing and everything works. It is connected to the second switch for power. It is difficult to trace the wire route without taking lots apart.
For anybody interested - are your interior roof lights deteriorating? On ebay at this time, early december 09, very, very similar lights are on offer on ebay. Exact hole size for the light. A bezel is included if you want to fit to the underside of the cabinets.
Ebay description - 12 volt brass effect light ceiling narrow boat caravan - listed by marc23west item no 300367337166 Only £2-50 each
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