2 pigtales?

I put them on all of our trailers. I'd never be without one again.
On a side note I bought an intermittent beeper from Radio Shack and wired it to the switch in the cab. The beeper is tucked behind the dash. I put a piece of electric tape over the beeper and poked just enough holes in it so I could hear when its on yet it doesn't drive me nuts.

 

I'd love to have one but I just rent the trailer so I don't get much say. Would be a handy feature to have.

 

Just to add to what Catalina' said our new Utility flats have a dump valve for the entire suspension but they don't have an extra receptacle. The wire is just coiled and tucked above the fifth wheel plate. Might save you some time by checking to see if anything is even hooked to the extra receptacle on the trailer.

 

Hurst, you might try putting power to the punched pin on your connector. I just bridged mine to my pigtail and sure enough was greeted by a nice rush of escaping air at the rear of the trailer. So mine is equipped with a dump valve after all.

 

Now, my question is how would one go about getting a second pigtail wired up to control it? I would assume kenworth would sell the switch that would go by the suspension dump and differential lock switches but beyond that?

 

Wiring is pretty strait forward.

 

As for wiring, I assume the T6 in your profile picture is your truck and if so if you open up the dash you will probably find several +12v accessory leads behind there that have power to them. All you need is +12v going into one side of the switch and just a single wire going to the 7 way plug on the back of your sleeper. If you have "spare" switches check them first as some of them may already have +12v to them. I have 7 on my dash and 4 of them were already "upfitter" wired which means they have +12v power supplied to them already.

Now I would strongly suggest you wire up a light, buzzer, tazer, bull horn, train horn SOMETHING to remind you that you have the axle dumped for a couple reasons, it's really hard on the trailer to run down the road with air to only one axle if your heavy and the bigger reason, it's really hard on your wallet when you roll across a scale and get popped for 35K on a single axle. My truck is equipped from the factory so I have a light in the main cluster telling me it's switched as well as that annoying dinger and a warning on the MFD display on the main dash.

Kenworth has a bunch of extra pass-through grommets on the firewall essentially right behind the clutch pedal. Take an ice pick and poke a hole in one of these then push the wire through and route it along the bottom of your cab/sleeper with one of the other bundles already there.

 

I used to sit behind a girl with two pigtails in grade school. However, she would get mad when I played with them.

 

The pigtail for liftgate is usually just one big connector pin.

 

On my Western, the yellow pigtail powers a set of backup lights and the auto lift function on the drop axle (lifts the drop axle when you shift into reverse).