What's the ground wire?

Asked by Jun 15, 2015 at 08:00 AM about the 2003 Ford Crown Victoria Police Interceptor

Question type: Car Customization

In my 2003 Crown Victoria (Police Interceptor) the stereo wire grouping has 2 Black/Light
Green wiresthat according to the wiring diagram found online are supposed to be ground wires
however there is also a solid blacK wire which in my experience is usually the ground so what
is the ground in this case? and if the solid black one is in the ground then what is it?

2 Answers

90

black will work ford regulates ground for every think where all other manufactures regulate power

90

or ground to anything metal

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