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Old 10-30-2005, 12:08 PM   #15
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Az,

The original poster has a 2005 CCD and I have a 2005 Safari.

I'm wondering if the 7-pin assignments might differ over the years. At least, when I compare your nice diagram with the not-so-nice diagram in my manual, wire color and assignment differ greatly.

Any thoughts as to what is going on?
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Old 10-30-2005, 12:33 PM   #16
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Hello Cammur -- Airstream's entire FAQ page is valuable. Please see http://www.airstream.com/product_lin...ervice/faq.tea and click on 'Plugs.' You'll see the functions are just as azflycaster's diagram suggests. I've seen the colored diagram in this thread before and don't believe it's from an Airstream source. My 2006 manual doesn't seem to have an umbilical wiring diagram in either the towing or electrical sections...

Though the Airstream website says "to 2002" it really means "to present" and would pertain to the trailers mentioned. This is how you need to match your plug to current day tow vehicle setups regardless of wire color. When rewiring my Argosy there was some variability in wire colors but it was pretty easy if I just paid attention to function.
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Old 10-30-2005, 12:41 PM   #17
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quick and easy

put a voltmeter on your coach battery and start your tow vechicle. you should see an increase of about 1.5 volts. i.e. 12.0v before you start it and 13.5v+ after. you should have a fuse in your coach on the vehicle charge line, check your owners manual.
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Old 10-30-2005, 12:44 PM   #18
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The plugs on the airstream site don't match the universal plug color diagram in Azflycaster's diagram.

The colors are different, which doesn't make any difference as those wires are all the same size, 14 gauge.

Most umbilical cable comes with 2-10ga wires (12V+ and ground), a single 12ga (brakes), and 4-14 ga wires for the lights.

As long as you keep the 10 ga and 12 ga wires coded properly, the other wires can be whatever color you want, as long as you write it down.

I prefer to stick with what 99% of the world uses, which is the diagram in Az's post.
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Old 10-30-2005, 03:38 PM   #19
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Agree, diagram in FAQ (see Canoe post) matches diagram in AS manual for my 2005, color and purpose. Diagram also matches Az's post in terms of purpose for each terminal, but not in terms of wire color; note this holds true as long as what Az calls the "car end" is actually the "trailer end".

That was certainly a confusing sentence I just wrote - hopefully my meaning is clearer.
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Old 10-30-2005, 05:08 PM   #20
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Old 10-30-2005, 05:22 PM   #21
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Quote:
Originally Posted by Canoe stream
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Old 10-30-2005, 05:52 PM   #22
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Thanks one and all.....as usual, the Forum comes through. I've determined that the Yukon is putting zero voltage to the pin marked "+" which is obviously the charging circuit. I think wingfoot321 had the same problem; now to find the fuse! I searched the manual and find all the other TRLR fuses, but alas, none for the charging circuit. My guess is that is wired directly from the alternator and needs a fuse "in line."
Regarding the solar panel; I "after market" installed it (off my last trailer), so I have 2 conventional 12-V batteries. I've yet to dry camp in good sun, so don't have a good feel for capability yet.

Any hints where I may find that missing fuse?
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Old 10-30-2005, 05:57 PM   #23
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There should be an underhood electrical distribution box, IIRC, on the driver's side in front of the master cylinder. Of course that is under the hood, hence the name. There are other spots for your MIA fuse to be, but that is where most of the towing fuses reside. Also, you should have that info in your owner's manual for your truck, just look in the index under "fuses".
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Old 10-30-2005, 07:23 PM   #24
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Good going, wildwoodrver! Obviously 23 responses to your post in 24 hours didn't throw you off too much!
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Old 10-30-2005, 07:52 PM   #25
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Quote:
Originally Posted by wildwoodrver
Thanks one and all.....as usual, the Forum comes through. I've determined that the Yukon is putting zero voltage to the pin marked "+" which is obviously the charging circuit. I think wingfoot321 had the same problem; now to find the fuse! I searched the manual and find all the other TRLR fuses, but alas, none for the charging circuit. My guess is that is wired directly from the alternator and needs a fuse "in line."
Regarding the solar panel; I "after market" installed it (off my last trailer), so I have 2 conventional 12-V batteries. I've yet to dry camp in good sun, so don't have a good feel for capability yet.

Any hints where I may find that missing fuse?
check this thread out, there are photos showing the general location of the fuse on a GM vehicle. you don't need to go to all the extra work i did, just plug a fuse in place.

http://www.airforums.com/forum...ht=2nd+battery

keep in mind the actual location and which pin is hot varies year to year with GM.

it is in the underhood fuse center, you just need to read the inside of the lid for the exact position.
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Old 10-30-2005, 08:26 PM   #26
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Quote:
Originally Posted by wildwoodrver
Thanks one and all.....as usual, the Forum comes through. I've determined that the Yukon is putting zero voltage to the pin marked "+" which is obviously the charging circuit. I think wingfoot321 had the same problem; now to find the fuse! I searched the manual and find all the other TRLR fuses, but alas, none for the charging circuit. My guess is that is wired directly from the alternator and needs a fuse "in line."
Regarding the solar panel; I "after market" installed it (off my last trailer), so I have 2 conventional 12-V batteries. I've yet to dry camp in good sun, so don't have a good feel for capability yet.

Any hints where I may find that missing fuse?
You've got pretty much the same setup I have, a 2005 Sub and 2005 CCD. My batteries weren't charging either. After some head scratching we found that the Suburban did not come with an inline fuse that's required. We cannabalized one and stuck in the the slot in the black box on the driver side of the engine compartment. That was all it took. Autozone and others sell those block type fuses.
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Old 10-31-2005, 09:41 PM   #27
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Mystery resolved. GM ships these vehicles with a dummy fuse in the fuse box. A quick call to the excellent support staff at GM resolved it. Unfortunately, the fuse is labeled "Stud 1." The description is auxillary power. It was pretty obvious as it was the only "dummy" in place. I guess they wanted to leave the option open to use it for other "auxillary" purposes (not just trailer charging circuit).

So with a 40 amp fuse in place, I get 12v at the pin on the back of the car. I was interested to read in the owners manual that if you want to boost the charge to the trailer, drive with the headlamps on. Gotta go camping now to test it!

The support rep told me they actually ship the vehicles with a fuse in the glove box. I didn't find it, but the car is a year old.

Thanks one and all. And yeah! What response! 24 in 24.
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Old 11-01-2005, 03:41 AM   #28
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keep in mind that the plug is now energized all the time, if you stop for the night and run your furnace you may need a jumpstart in the morning!

that is why i isolated my second battery as shown in the above thread.

you can just pull the plug when you park...

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