New to Airstream forum, I am just started working on my 65 tradewind but some of smily's questions are pretty easy.....I in fact have never found 'univolt' on my wiring, but haven't torn up much and will only this weekend put different battery in trailer. I intend to find out wiring schematic of airstream somehow/someway....this forum gives lots of good answers and leaves lots of questions..............mine mainly have to do with why all the wires in line to hitch....mine are worn and showing aluminum..I intend to replace. But someone in forum mentioned sytem charges battery when hooked up. Thus on newer vehicles you need relay like described and I might put in electronic amperage limiter, (Radio Shack), limiting charging voltage to 14 volts @ 2.5 amps thus not heating up system....ie trickle charging. But I am going to change plug system to newer style. I have no paper on trailer, Secretarial Svcs is sending me a owners manual, does anyone have wiring schematic from 64-66 models they might photocopy and send to me??
Inland Rv
My Univolt is in a 1970 overlander. The model is 35 and the serial number is 5132. the nominal output on the tag is 13.5 volts. I also took a picture of the regulator board in it but can't copy it in this text? What is the best way to include pics in this text? Maybe my posting does not apply to the last 10 years for the Univolts but I am willing to bet nobody can give me facts proving any of my statements are wrong for my 1970 Overlander.
My "univolt" which is a "Parallax" converter series 7400 started to act up this last weekend. The 12 volt lighting got dull then bright and it finaly quit alltogether. Its less than 2yrs old, I checked the breakers and I still have 110 from shore power and the battery was fully charged (its not now) I looked at my warrenty and it says I have to bring to the dealer and they will send it to them ....this will take a month....its camping time now! GRRRRRR
joatmon, sorry but that parallax.com is wrong. Can you help me get the proper address to get that schematic. I really would like to restore my Univolt.
Frenchbern,
Sounded like you had that UNIVOLT all figured out for a minute there. Here is the site www.parallaxpower.com but I don't think you will find the schematic for a 1970 Univolt there. I think Litton was making them then but I'm not sure. I would not throw good money after bad trying to restore that thing but rather get a new 3-stage. We carry the Inteli-Power, WFCO, and several others too but shop around. Airstream recommends the Parallax 7400 series. We have those too but not huge fans as they are not 3-stage, but they do work.
Andy, Right you are by saying Newmark is the manufacturer of the 1970 Univolt. It is marked on the front plate.
The facts I stated in prior message are still valid since all of the 12 volts fuses are located in the Univolt. Therefore the tow vehicle system and the shore power 12 volts are all interconnected through the Univolt and that is why I listed the appropriate fuse and path for the current flow.
By Cleaning up the wiring where my univolt was, I gained a big storage area. Really worthwhile to do it. It took me a day because I soldered all wires instead of just crimping the lugs.
while we're on the topic, I want to install a shutoff switch for my Univolt. Do you recommend just putting a 110V household switch on the AC input to the univolt? I don't want to destroy anything by putting it in the wrong spot in the system.
Thank you Leipper for link. After reading the article which i agree mostly with, I don't see how anyone came out with the conclusion to never use series batteries in an As?? Now can someone tell me why not to use GC batteries?
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New to Airstream forum, I am just started working on my 65 tradewind but some of smily's questions are pretty easy.....I in fact have never found 'univolt' on my wiring, but haven't torn up much and will only this weekend put different battery in trailer. I intend to find out wiring schematic of airstream somehow/someway....this forum gives lots of good answers and leaves lots of questions..............mine mainly have to do with why all the wires in line to hitch....mine are worn and showing aluminum..I intend to replace. But someone in forum mentioned sytem charges battery when hooked up. Thus on newer vehicles you need relay like described and I might put in electronic amperage limiter, (Radio Shack), limiting charging voltage to 14 volts @ 2.5 amps thus not heating up system....ie trickle charging. But I am going to change plug system to newer style. I have no paper on trailer, Secretarial Svcs is sending me a owners manual, does anyone have wiring schematic from 64-66 models they might photocopy and send to me?? 
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