Electrical... I'm scared!!
Post Fiend
Joined: Jun 2003
Posts: 8,209
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From: Black Hills of SD
What does the other black wire it's paired with do? If it's a ground then the wire was also intended to ground. It's never uncommon for harnesses to have unused wires, very typical in simplifying production to design a harness for other options or applications.
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Posting Guru
Joined: Aug 2012
Posts: 1,241
Likes: 2
From: Rockville, Ct.
The long black wire also has a green line on it (Not sure that means anything ). That goes to the CVR and the outer posts of the fuel, temp, and oil gauges.
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