We had that problem and it was a blown fuse. If you type "blown fuse" in the search box you will find a lot of information on what to look for.
Welcome to the forum!
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January: Can Opener, Topsail State Park, FL
In addition to the fuses, make sure that your battery is connected and in good condition. Is this a new-to-you trailer? If not, did the 12v lights work previously?
Dave
Don't forget to check your grounds. Many of the 12v connections have a hot wire and draw ground from the shell of the camper. There's lots of info here on checking ground and the other issues listed above.
Welcome to the forums, you're at the right place to find all the info you need to get it runnin' like ya want it.
Jim
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honestly this is our first rv we have ever had we did get water in to the trailer.dont know why but water started to go in then we got a water leak somewhere in the floor of the sink in kitchen need to figure that out i think its the water holding tank. back to no 12 volt after we plug in to 110 the fuses look good but we dont have battery we wernt sure if we needed battery if were connected to power source or if we needed battery only when we wernt pluged in. hope you understand what im saying. working on it agin tommarrow trying to open awning one side of it has a broken arm lift or what ever its called any way the thing you use to open it up. good thing we learned how to flush toilet.planning to live in it for 6 to 8 mnths while we build hope i dont come to hate it because were planning on keeping it to use for rec. after get house done.
You can either spend a lot of time on learning all about trailers and how to fix them or you can drag it down to the local RV shop professionals and have them fix it for you for a couple hundred bucks. If you go the do it yourself way you will take time away from your house project but will be better off for when you have the time to use the trailer for travel. If you do not have a service manual for the unit I would consider it a necesity you can easily buy on ebay for about $40.
I agree with dwightdi in that sometimes you've gotta go hire a professional for your projects.
My wife and I have taken a hybrid approach to this when working on old cars, boats, trailers, etc. We try to to do the work ourselves first before hiring someone. Our trailer is in the shop right now for repairs that we could not do ourselves.
When plugged into shore power do the 110v outlets work?
You state that you do not have a battery. Are the battery leads insulated or are they touching each other, or anything else?
I too agree with Dwight. Base on your discription I think you would be money ahead to have it serviced.
In the even you want to learn to do it yourself, a lot of information is right here.
Hey, when you get a chance, it would help other menbers if you went to that original post about not having any water and typed an update. A couple of people gave a suggestion and might want to know if they were able to help.
you did not say if this is something you can park in a shed and work on for awhile. If so I would consider going through the trailer very thoroughly. Definately get a manual, if possible both an owners and a service manual. Look at the various threads in the forum. Look at the plumbing, heat, fridge, 12v & 110v electric. You will know the system inside out when you are done. There is little that could go wrong that you cannot deal with.
If time is a constraint....mechanic. Good luck & welcome to the world of vintage Airstreams (warning...spending excessive time in vintage Airstreeams can be addicitve)