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Old 09-12-2010, 05:26 AM   #1
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1975 31' Sovereign
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wiring colors for electric jack/ breakaway switch

I have a 1975 airstream soverign. The brakeaway switch and power jack wires need replcing. The 2 wires coming out of the tongue are red (large wire and yellow. I see in the plug diagramm that yellow is the brake line so that makes sense, however, the breakaway switch has 2 wires. where does the 2nd wire connect?. The rd wire is a larger guage red wire, which in the diagram is the left turn and stop wires. Is the correct wire for the power jack as well or is something screwy?
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Old 09-12-2010, 06:02 AM   #2
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the large red wire is 12VDC positive from either the battery, coverter or from your charge line on the tow vehicle . It powers the electirc tongue jack and also connects to one side of the break away switch. This normally open switch (off) is only closed if you pull out the pin on the break away switch and closes the switch (on) which completes the circuit to the electric brakes and applies the brakes. the other side of the break away switch is connected to the yellow wire.
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Old 09-14-2010, 09:46 PM   #3
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12 volt wire

Chris.

Airstream has always used a "blue" wire for the charge/12 volt wire, that the breakaway switch and electric jack hooks to, and continues on to connect with the charge line from the tow vehicle.

The red wire is for the left turn signal.

Perhaps the previous owner of your Excella, decided to change things around.

Andy
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Old 09-15-2010, 06:27 AM   #4
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Quote:
Originally Posted by wasagachris View Post
the large red wire is 12VDC positive from either the battery, coverter or from your charge line on the tow vehicle . It powers the electirc tongue jack and also connects to one side of the break away switch. This normally open switch (off) is only closed if you pull out the pin on the break away switch and closes the switch (on) which completes the circuit to the electric brakes and applies the brakes. the other side of the break away switch is connected to the yellow wire.
Our 71 is the same. Red to jack and one leg of the breakaway. Other leg of breakaway to the yellow wire.
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Old 09-15-2010, 02:10 PM   #5
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The picture shows my front wires associated with the 7-way plug. The brake wires are the black and white two on the left side inside the red sleeve. The break away pair are on the left side. One is red, one is gray. Both 12 gauge I think. In the picture, they're tied together with a wire nut. Please ignore the wire nut. It's not right. The red wire is the power wire that the tongue power jack also gets it's power from.

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The wires going right are the coach lights and one of them is red. That's the red Andy is referring to. As seen, my trailer has two reds to the 7-way, both associated with different things. My picture is how I found things. I have since fixed it all and reinstalled a fuse panel.

I wired my trailer according to this wiring diagram. The trailer running lights on my trailer matched the colors shown in the diagram. My brakes and my break away switch wire colors didn't match colors. My main 12 volt power line to the battery is 10 gauge blue.

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I did splice in the diagram colors to my 7-way plug so if somebody comes behind me they will be able to immediately figure out what everything's for because the colors match the diagram as well as the Airstream Service Manual.

I believe my trailer wires are as installed by the original equipment manufacturer. There was no evidence at all of any panels removed for access nor were any of the original furniture built-ins ever removed.

Gary
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