I hope someone can help. I posted pics of the wire I am questioning at http://new.photos.yahoo.com/drhovey@sbcglobal.net/ (Wire 1 -4 pics)This is on my 68 SS 396. There is no air conditioning, and no air pump. I want to get my in the dash tach working, and I was wondering if this had something to do with the tach. The wire seems to be going into the junction block that leads into the fuse box. Any help or suggestions would help.

Thanks
HovsSS

Is that wire brown or some other color, or does it have a cloth covering? With the key on, does it have power?

Looks like your resistor wire to me.