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Old 12-26-2019, 06:51 PM   #1
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1970 Ambassador bath fan. 2 speed?

Hi All,
I just removed the bath fan on our 1970 Ambassador. I have included a picture below of the fan switch wiring (the switch fell apart). My question is, are these fans typically 2 speed? I have never operated the fan, so any help/guidance will be appreciated!


Thanks,
David
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Old 12-27-2019, 04:02 AM   #2
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My 1969 looks identical and yes, I was surprised to learn it is two-speeds.
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Old 12-27-2019, 04:05 AM   #3
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Originally Posted by 2002shds View Post
Hi All,
I just removed the bath fan on our 1970 Ambassador. I have included a picture below of the fan switch wiring (the switch fell apart). My question is, are these fans typically 2 speed? I have never operated the fan, so any help/guidance will be appreciated!


Thanks,
David
Yes, it has two speeds: Regular, and exotic food.
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Old 12-27-2019, 04:17 AM   #4
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Originally Posted by overlander63 View Post
Yes, it has two speeds: Regular, and exotic food.
Terry, or it might be camp vs rally chow.
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Old 12-27-2019, 10:22 AM   #5
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Hi Matt, Terry and GC,

Matt, thanks for the info -- it is exactly what I needed to know! And Terry and GC, thanks for the entertainment :-)

Happy New Year!
David
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Old 12-28-2019, 10:35 AM   #6
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Convert to 12 volt?

Hi All,
While researching this topic, I saw that several people had converted the fans to 12 volts. I totally get why it would be desirable for the overhead lights to be 12 volts, but the fans (over the cooktop, bath) would not be on for very long, correct? So even if using the battery and a inverter neither would likely drain the battery... or am I wrong on this?


Thanks,
David
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Old 12-28-2019, 11:34 AM   #7
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Convert fans to 12 volts?

Hi All,
I just read a bit more, and finally absorbed the fact that the interior lighting is already 12 volts.

Can I assume the following?:

All "household-looking" outlets are AC

The bath fan and kitchen fan are AC

The interior lighting is 12 volts DC

All of the above were supplied energy that passed through the Univolt (so AC came in and was converted to 12 volts DC for the lights, for example...

Does/did the Univolt also convert 12 volt battery power to 110 AC? (Is it an inverter?) I already purchased a voltage converter based on the hatred expressed for the Univolt, but I have not yet installed it.


Thanks,
David
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Old 12-28-2019, 03:26 PM   #8
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My ignorance...

Hi All,
Okay, I am finally starting to understand. The fans and lights are 12 volt. My remaining question is regarding the Univolt. Is it only a voltage converter as in 110 volts AC to 12 volts DC?

It is NOT an inverter (12 volts DC to 110 volts AC), correct?


Thanks,
David
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Old 12-28-2019, 03:40 PM   #9
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Correct as stated.
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Old 12-28-2019, 05:20 PM   #10
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Hi RM,

Thanks !!!!!



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Old 12-28-2019, 07:21 PM   #11
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Hi California David, Colorado David here. Happy Holidays to you and yours.

Airstream was one of the first travel trailers to install all "creature comforts" as 12v. All lights, all fans, water pump, furnace fan, operate on 12v. This is so Wally B could be in the middle of Africa somewhere and be totally "self contained". The "univolt" system means everything is 12v., or just one voltage. The "battery charger" transforms 120v to 12v to charge the battery, and while it is at it, why not run all the 12v stuff too? So your bath fan and all other stuff in the trailer can run on the 12v battery OR the 12v converter.

The 120v outlets came later as a convenience, maybe in the early 60s. And then came 120v air conditioners.

It might be you will want to replace that old bath fan with a new one. The one in my 75 Overlander, and the one in my friends 76 Sovereign are single speed. Same with all the roof fans.

Colorado David
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Link to my 1975 Overlander Improvement Journal:
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Link to our 1976 Renovation Project:
https://www.airforums.com/forums/f221...ct-202081.html
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Old 12-28-2019, 11:48 PM   #12
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Hi CoD,
Great to hear from you — and I hope your holidays have been fantastic!!!

I always appreciate your contributions, and today was no exception. Thanks again, and Happy New Year !!!


All the Best,
CaD
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Old 12-29-2019, 12:07 AM   #13
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hello david, replace the univolt. it will boil out your battery if hooked up to long.my 70 GT boiled out 2 batteries before i found out the problem. changing converters is not hard nor too much money. good-luck. kurt
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Old 12-29-2019, 06:59 PM   #14
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Thank you California David: We need to introduce you to someone who really does know what they're doing!

Holidays are always good for the most part. Being with family and friends is the best.

Good advice on a new converter. The modern ones won't overcharge a battery, and even "condition" it now and then. They switch from "fast charge" to "trickle charge" automatically based on how the battery voltage is pushing back at them. A new converter should be parts of most people's renovation plans. $250 or so gets a good one.

Colorado David
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Link to my 1975 Overlander Improvement Journal:
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