keeperjones

I am changing out the stereo in my 97 993 and I came across this tube that was not connected to anything. There is not a lot of things you can see through the stereo hole, but I don't see anything. I thought it might be the vacuum line for the AC system recirculation flap actuator, but I don't think it is the right kind of hose. When I turn the car on, I don't think I feel any vacuum through it, regardless of the position of the recirculation button. I don't really want to put it back together without figuring it out. I am not even sure what to search for. The only thing tubing or hose under the dash related that comes up is the vacuum line. It is about the same size as the windshield washer fluid line, but I don't think that comes inside the cab. Anyone have any ideas?

KJ

TakeFour

Vacuum hose for one of the servo motors

ToreB

This is not correct at all. The HVAC servo motors are electric, all five of them. The thread starter is also right in mentioning that this hose is not a vacuum hose, the one going to the recirculation flap is a stiff plastic tube, about 5-6mm in diameter.
Since I am posting anyway, my best advice would be to pull the hose and try to find where it goes.
Tore

Mr.Woolery

It's probably a breathalyzer ignition hose, LOL

keeperjones

Well, mystery solved. I pulled the CCU just to make sure it wasn't the vacuum line and it wasn't. ToreB is correct, the main vacuum line is stiff and a smaller diameter. It uses a bigger black rubber piece to connect it. I was trying to figure out where it went and I figured out that it went into the wiring harness and that didn't make any sense. I just happened to look into the tube with my phone magnifier light and all of the sudden things started to make more sense. It is not a tube, it is wires. After a little bit of research, I found a picture of the stock stereo wiring harness. You can see from the picture, when the original owner had the custom stereo install, they cut the harness and I guess they just shrunk back in there. You can even see where the black on the "tube" came from. Thanks for the replies