Today I removed the spare tire for the first time. Under it on the right was a wire harness and plug that is not connected to anything. Can anyone tell me what this is (for)?

 

Rear ejection seat.
Hmmmmm. Is your rear seat missing? It may have ejected.

 

It's for the optional towing package.



J/K

 

those are actually a couple of pretty good guess's

maybe a cigaretteligher plug in to keep cordless shaver charged?
or plug in the inverter for laptop?

Thanks for sharing the location I will figure out somthing for it.

 

I tested the leads in the plug to see if they were in fact related to the brake, turn signal, or any lights....and they were not.

Any other ideas about what this harness is for?

 

Immediatlely after reading this thread, I ran out to my garage to see if my rear seats were missing and they were!! So was the wiring harness you speak of.

 

I am 90% sure that it is the pre-wire for Sat Radio harness. This would explain why the orig. poster with an '04 had it, and those with '03s did not. I have read that the open end of the pre-wire is somewhere around the spare tire.

 

My 03 definitely didn't have this plug.

 

Bria5 is right,
It's for the Sat Hookup. THe other end is plugged into the factory headunit. I thought it was only on the Bose radio, but my 04 enthusiast with stock radio, also had the wire.

 

That plug is the N-Bus conn. that only Touring models w/bose systems have. You will use this to connect your sat. radio to the stock deck.