I have a 12V issue that is making me scratch my head a lot. I have two batteries (along with selector switch)...and the batteries are brand new this season. I had an old interior cabin light (incandescent) that I replaced with an LED light (with lo-high switch). During my install the light was operating intermittently so I returned the light to WEST's and got a different one.......still experienced the same problem....light is working intermittently at both settings..........the batteries are fully charged, and I've tried the light when the engine is running putting out 13.5V....sometimes it works, often times it doesn't (I've checked all of the connections....and the leads at the light read 12V)..........once I expended my available time for the LED light project, I moved onto why the cigarette lighter socket was not working for my handheld light........I can't figure that out either......if I plug the light into my car, it works fine........if I plug it into the boat cigarette lighter socket, it does not work, and I've measured 12V from the socket. Again, I tried it several times, and a couple of times after the engine has run for awhile (putting out 13.5V) I'm hoping someone out there tells me some very simple/easy to remedy this. Thanks for the support.