I always assumed they were for fogs too, as my 98 did not come with them. But, my 2000 has factory fogs and I still have that empty plug. At this point I have to agree with Diefenbaker. They use the same harness's a lot of the time. And certain aspects of the system are just deleted from the PCM's programming, or fuses and or relays left out.

 

I think we may have a winner!



straight from alldata

 

I knew it was the 4x4 jumper!LOL JK Good find Maxx

 

I never knew the 2 horns were high note and low note, both of mine sound equally crappy.

 

It should be that all vehicle horns are paired as a high note and a low note. Also, I believe that they are in the key of F.

 

car/truck horns are tuned to an interval of a perfect fifth. It's a more pleasing sound that blends well.

A train horn is tuned to an augmented 4th, or what musicians commonly refer to as a tritone. This interval does not blend well and causes dis-chordal semiquavers that grate on your ears, which is why you notice the sound of a train horn more than a car horn.

 

All be damned, I stand corrected.