Help Identifying Wire?

[Andy Antipas]

I'm in the process of renovating my '79 SC and I'm cleaning up the floor panel and interior panels for new carpets. I haven't been able to identify the white wire shown in the photo. There is a black and white wire within the white plastic housing. The car originally had auto heat, but I have backdated the heat. I'm wondering what the wire went to?

[75 911s]

Looks like it was added later. Maybe part of a rear decklid alarm sensor.

[Dpmulvan]

Originally Posted by 75 911s

Looks like it was added later. Maybe part of a rear decklid alarm sensor.

If it was added later it wouldn’t have factory glue on the wire sheathing.

[Dpmulvan]

I was thinking o2 sensor but that didn’t come out until 80 I think?

[timmy2]

Looks like Thermocouple wire? Where does the other end go?

[911MANN]

Does your car have AutoHeat? That does look like the sensor wire that goes back to the left heater box.

[Andy Antipas]

It originally had auto heat, but it has been backdated to manual heat. I will see if it is connected to anything anymore. I replaced the flapper boxes 10 plus years ago. I don't remember the wire. Thank you everyone for your thoughts!