Am i looking for  a unicorn to replace sealed light assy that will mount to exisitng holes on a 20 year old trailer

The bolt pattern for trailer lights has been pretty standard for longer than that. I replaced the lights on my near 50 year old Shoreland'r - and the bolts lined right up with the existing holes. Only hole I drilled was for a grommet to feed the wires through the frame rather than above or below it.

 

18 minutes ago, MN Fisher said:

The bolt pattern for trailer lights has been pretty standard for longer than that. I replaced the lights on my near 50 year old Shoreland'r - and the bolts lined right up with the existing holes. Only hole I drilled was for a grommet to feed the wires through the frame rather than above or below it.

 

And if it isn't, how hard would it be to adapt a plate or bracket?

5 minutes ago, Deleted account said:

And if it isn't, how hard would it be to adapt a plate or bracket?

Or just drill a new hole...

11 hours ago, MN Fisher said:

The bolt pattern for trailer lights has been pretty standard for longer than that. I replaced the lights on my near 50 year old Shoreland'r - 

 

MN Fisher is right. 

 

I have had 5 or 6 boat trailers over the years and have replaced the lights on most if not all of them. There are two sizes of trailer lights. Pick up one that is the same size as the one you want to replace and it will probably bolt right on. My only suggestion would be to go with LED lights. 

 

BTW my 40 years old Shorelander is still doing good. ?

Take the old light assembly to a RV store, they should have exactly what you need! Some lights don’t use bolts, the use a rubber gasket to hold them in the rectangular hole.

Tom

 

 

3 hours ago, Dogface said:

MN Fisher is right. 

 

I have had 5 or 6 boat trailers over the years and have replaced the lights on most if not all of them. There are two sizes of trailer lights. Pick up one that is the same size as the one you want to replace and it will probably bolt right on. My only suggestion would be to go with LED lights. 

 

BTW my 40 years old Shorelander is still doing good. ?

My LEDs have finally Started messing up. They did last longer than the regular ones but cost more too. 
 

di electrical grease is your friend. 
 

I pull my boats way more than most people and they live outside. The guts of any lights will corrode if you use them often. 

Go with led's with back-up lights and thank me later.