Is this supposed to be a ground wire ?

[mtnmankev]

Replacing the under dash harness and fuseblock finally.
The wires coming from the fuel tank selector switch are pink (goes to fuse block for power obviously) and a pink w/ black tracer with a connector on the end.
This is my OEM existing harness in the pic.
Is the connector supposed to go to a ground, or plug in somewhere else?
The donor harness came from a diesel model, obviously with single fuel tank, so I have to reuse some of my existing wiring, and hopefully I won't need to do any "creative wiring".

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[custodian]

This is the fuse box from my 85 C10 that was a diesel, now a gas motor, that has dual tanks.

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[mtnmankev]

Well, I will inspect it closer, if it has dust inside, it was never connected to anything.
If it's shiny, it plugged in somewhere.
If I leave it unplugged and everything still works properly, I won't worry much.

CrazyArk just looked at his 86 and it should be a ground if GM used the same wire color codes.