Series 1 - Cig Lighter Help

[Moltar]

So while reassembling my early 71 car, I accidentally shorted out the cig lighter. The black wire coming out the back is toast - completely fried.

 

Now according to my FSM the black only serves as a ground - but does it serve as a common ground - ie connected to anything else? I wonder this because the wire runs up the harness deep into the dash.

 

Also, why did Nissan run a ground wire up the harness? Shouldn't it be self grounding? This is why I'm afraid it might be a common ground - but the FSM is no help here.

 

Any help is greatly appreciated.

 

~Thanks

[Moltar]

I definitely lucked out on this one. Only about 8 inches of wire was lost (3 of which welded the coil of wires into one solid wire).

 

Cut, soldered, fixed. Glad I lucked out.