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Old 11-19-2015, 12:16 PM   #1
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bumper outlet

Where do you obtain proper outlet for an Airstream? I just bought a 2002 Chevrolet Silverado and it's got a tow package with 4 pin wiring socket. I need to connect a 7 pin socket on the bumper but the wiring seems to be wrong on the ones I have found so far. Any one have this problem?
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Old 11-19-2015, 02:10 PM   #2
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You can get anything you need from a place like eTrailer, but you to need to install a standard 7 pin to the wiring harness in the truck. If it did not come with one, you will have to wire a harness to all of the appropriate wires. The 4 pin is only lights, it does not include what is necessary for brakes or 12v charging. A brick and mortar truck/trailer/rv place could do this for you.
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Old 11-19-2015, 03:01 PM   #3
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Quote:
Originally Posted by terrencecolp View Post
Where do you obtain proper outlet for an Airstream? I just bought a 2002 Chevrolet Silverado and it's got a tow package with 4 pin wiring socket. I need to connect a 7 pin socket on the bumper but the wiring seems to be wrong on the ones I have found so far. Any one have this problem?
Your truck does not have the tow package if it only has a 4 pin connector.
If it had the towing package from Chevrolet, it would have included a 7 blade connector installed at the factory. It would have been partially pre-wired for a brake controller.
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Old 11-21-2015, 12:26 AM   #4
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Would I have to tell the rv place that I own an Airstream, or are all 7 pins wired the same?
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Old 11-21-2015, 01:18 AM   #5
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Most are the same. My TV has pulled 6 different trailers that I can think of ranging from 1968 to 1995 model years. All were the same.
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Old 11-21-2015, 07:38 AM   #6
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A Tekonsha P3 brake controller would work.

We installed a Tekonsha Prodigy RF unit in our 2007 Mercedes ML320 CDI with the factory installed towing package as the first three months of production (OCT-DEC 2006) of the car they did not run wires to the brake area of the car. So their seven pin plug had all but the brake control signal (usually the blue wire). The primary restriction in the use of the Prodigy RF is incompatibility with a disc brake conversion where there is an electric brake pump energized to pressure the hydraulic brake calipers.

We left the trailer battery charge circuit in place in the vehicle 7-way socket to power the Prodigy RF but that circuit does not go inside the trailer since the lithium iron phosphate battery requires a more sophisticated charger. That battery is charged by the 500 watt solar system or shore power.
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Old 11-21-2015, 08:28 AM   #7
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Would I have to tell the rv place that I own an Airstream, or are all 7 pins wired the same?
No, all trailers are not all wired the same. Previous owners change them.

I owned a 1970's Airstream that had a 7 round pin connector on the end of the cord. I had to convert it to a 7 flat blade connector to work with my newer tow vehicle.

If It were me, I would:
(1) Purchase and install the 7 flat blade connector on your truck, similar to the type that comes on new trucks. Maybe this:
2002 Chevrolet Silverado Custom Fit Vehicle Wiring - Tow Ready
You can also get these at your local auto parts store.

(2) If your trailer does not already have the 7 flat blade plug you will need one. If it already has the correct type, you still might have to rewire it to match the wire pattern of the plug on the truck. The wire colors of 1970's trailers do not match the wire colors used today, so you will have to make sure to get the wires in the correct position in order for them to function correctly.

(3) Get a good trailer brake controller. It is not legal to tow your trailer without trailer brakes.
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Old 11-22-2015, 04:20 AM   #8
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So the best solution to go would be; wire a 7 pin socket as per Chevrolet standards, buy a 7 male to 7 male umbilical cord, rearrange the cord wiring to match trailer socket of my Airstream(I have the wiring schematic for my 76).
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