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Old 10-30-2018, 02:52 PM   #1
1 Rivet Member
2019 27' Flying Cloud
Scottsdale , Arizona
Join Date: Oct 2018
Posts: 10
Wiring harness

New RVer with a new Airstream FC27FBT. Also a ham. Trying to find 20A of DC in the entertainment cabinet next to the stereo for my transceiver. Found this bunch of “unused” wires and am wondering if any of them carry 12VDC?

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Old 11-05-2018, 09:03 AM   #2
2 Rivet Member
Clovis , New Mexico
Join Date: May 2016
Posts: 53
Find a wiring diagram for your model of airstream or get a cheap multi meter from Harbor Freight or off Amazon. A multimeter would tell you instantly.
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Old 11-07-2018, 03:17 PM   #3
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waninae39's Avatar

2017 22' Sport
NCR , Ontario
Join Date: Feb 2017
Posts: 2,411
HAm too V e 3 H I u

IMHO, remove all power, disconnect Ac and battery, and remove all fuses from the distribution panel

tone the lines to see where they go
you can try to test connectivity to the DC breaker panel, so that you can find what goes to what terminal. Then document WHAt is real in your unit. A year from now , you may forget. Take many photos and label them well for the future

also get the REAl schematic for your make and model for AS
If not online, a call them and they will send you the soft copies
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Old 11-07-2018, 03:55 PM   #4
Rivet Master

2007 22' International CCD
Corona , California
Join Date: Jul 2013
Posts: 8,580
Best way to power the transceiver is to run a separate set of heavy wires direct to the battery bus bars where the battery cables connect. Fuse the hot side there. For 20 amps, you need a minimum of #12 wire--the ones you have there don't look big enough.

In our AS, we have an FT-857 setup. The head is remote cabled to the desk in the rear of the cabin, and the main unit is mounted in the streetside wardrobe cabinet. The main unit is powered from a PowerWerks distribution panel mounted near it. The line from the battery bus bars under the front bed is a dedicated #12 red/black zip wire that ends in a 40 amp powerpole connector plugged into the distribution panel input. Makes it easy to shut it down when in storage. Antenna leads are also available that connect to feed-throughs that go into the refrigerator upper door area from the wardrobe. We can connect portable antennas there. A UHF/VHF whip is also run in through the solar panel combiner box that accesses the top of the wardrobe.
Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it.
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