Super Fuzzy Moderator
Join Date: Oct 2006
Location: Sydney Australia
Thanked 128 Times in 119 Posts
Rep Power: 10
I wonder whether the clue is in the "drains our battery" singular. If the anchor is a halogen then they will fail early if they are undervoltaged and if you only have one battery then by the time you go to beddy byes having run your cabin lights etc you probably don't have much left in the tank to begin with. If you also have a stereo and a fridge running off the same battery you were doomed before you began. On the other hand if it's an '83 model and has never had the wiring and anchor light upgraded since new I'd reckon your lampholder is shot or your wiring is simply not up to the job. Many boats from that era simply had cable up the mast that was too thin to carry the 12v current. Few people realise that 12v actually requires heavier wiring than mains voltage. If your nav lights are at deck level and are OK then that would support my theory. Get yourself a new anchor light, you'd be silly to not to go LED as even if your cable is not up to carrying 12v it should be happy with the amperage of LED which is bugger all.
Now, if your anchor light is part of your nav lights (i.e a tricolour with anchor and it's all at the top of the mast) I'd reckon the lampholder is shot.
By the way, if you are running your battery dead every time you go out then you have probably ruined the battery. It also takes a lot more than an hour or so to fully charge a battery that is completely flat.
Andrew B (Malö 39 Classic)
“Life is a trick, and you get one chance to learn it.”
― Terry Pratchett.