My lights do not illuminate as brightly as they should. Flashers when they feel like it. Funds are limited and I don't want to take away from the original Shasta parts.
Behind the lens is more than slight rust-the metal breaks in your hands.
What I am thinking about is having a welder add two pieces of angle iron to the far ends of the bumper with a plate attached to house new lights and run the new wiring to the front. I would leave all of the old as it is-just not in use.
If your lights are not as bright as they should be then I would check and clean all grounds. Also, if you are checking your trailer lights while hooked up to your tow rig, try firing up your rig and see if the bump in voltage doesn't help with the funky flashers and dim lights. I know it made a difference in the way that my tail lights acted.
The paint lids work for Bargman 99 lenses. They are pretty flimsy. I coated them with Rustoleum clear. Only time will tell if they rust out. If you have Reflecto 110/150s, a stainless steel flat toilet flange fits perfectly and is much more weather resistant.
X2 on checking all grounds. The light all ground through the body (at least they do I mine). checking grounds there as well as the hitch harness is a good idea. After doing that with some new lenses on my '59 they shine bright.