Reversing Light Problem

Folks,

Got a 95 Triton that likes to have the reversing lights on all the time, only had the truck 6 weeks - but didnt think the problem was there when I got it - cant see my bum when im drivin! Eventually the fuse blows..so maybe it was blown when I got it?

I thought it would just be the reversing light switch on the box - so got another one ($44.00 Jeez!) - same problem.

I had a very minor tail ender, and have only had the car back a few weeks - but no wiring damage - (just bent the panel behind the towball) They did put a new trailer wiring plug in - but pulled that apart and all looks ok. Took all the wires out of it any way, made sure none were touching - reversing lights still on when ignition is on. Allother wiring looks fine.

Followed the wiring underneath - no damage.

But when I take the reversing light switch out of the gear box - and push it in - lights go out. So my first question is - is the little switch pushed in most of the time, and when you throw it in reverse, it releases the switch? (I thought it would be the other way around?

So I reckon either the widgy thingo in the box that pushes on the switch is broken - how likly is that? or the wire is getting current from somewhere else?

Any ideas? Dont reverse much in the dark anyway.......