STINGER'S TRAILER 3RD AXLE LIFT SWITCH?

You can spec labels when you order spare switches. If it's an electric switch, you'll probably find the end of it in a bundle inside the left frame rail at the back of the sleeper. If it's an air switch, not sure where they go. I've got an air slide switch but no slider, but I've never chased it down.

 

If you do not have any extra electrical cords going to trailer, It may be set up for a 4th axle lift axle for heavy haul. Or to raise the trailer 4 inches by inflating the trailer air bags to get trailer over curbs, driveways with scrapping the bottom of the trailer. Car haulers can have both raise and drop controls on the suspension system.

 

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I assume on the Western Star the switch is labeled 3rd axle because the Western Star switch package accommodates the heavy haul industry that will use a lift axle/3rd axle on other style trucks. Cottrell may have hooked to that switch if the original owner ordered the over-lift option since it was a spare. My rig has the 3rd air line to the trailer for the over-lift. The dump switch (separate option) for the trailer on my rig is an air activated toggle switch mounted on the trailer hydraulics control panel.

 

I specd my truck with 2 blank air switches. They have air to them but the ends are capped. I plan on using one as a dump valve for the front and the other for a truck/trailer over lift and bumper lift. It also has 2 rocker switches that aren’t being used will wire all of the extra lights to those

 

It can be either way. Some of the older rigs that I am familiar with only do the trailer.

 

I had a truck with a T&C headrack and they set it up with separate switches for truck and trailer