Join Date: Sep 2011
Location: The Hill Country of Central Texas
Stolen from a Mustang blog.
"You have a black wire with a red stripe that is attached to the post on the back of the alternator marked 'Grd'. This is, that's right, the ground. This is basically one wire with three ends. One end is attached to the alternator, one end is attached to the engine block on the same bolt that the negative battery cable is attached to, and the third end goes through the headlight harness and is attached to the radiator core support with one of the screws that holds the voltage regulator onto the car."