any one know what the yellow wire is supposed to connect to? someone has cut it and it is just hanging. it is connected at the other end to the # 5 terminal of the dash plug on a 69 mustang mach 1 non-tach car. Also anyone know how to add a picture to this thread?

 

Do you have an ammeter gauge in your cluster? Is it working? The yellow in '68 was for the ammeter, probably the same in '69.
http://hammar.dyndns.org/~djhamma/wiring/1968/E3.jpg

Pics - right above where you type your question you will see an icon with a mountain and the sun, click that 'insert image' and it will give you a box to paste a direct link to your pic. You may need a hosting site like photobucket, etc., many are free.

Jon

 

Thanks, I traced the printed circuit board & it appears that it goes to a light in the dash that is a warning light for the brake system. When the rear disk brakes were installed a new equalization valve was installed. I am assumming that the wire was cut at this point.