Fuel tank wireing.

[Hell Knight Hicks]

I need the color codes for the wires coming out of the tank going to the connector for the sending unit.

I know
grey is to the fuel pump
Black is ground.

But there's a blue wire coming up for the fuel level sending unit. What color does it go to?

Thanks

 

[VorTecxas]

What year. they changed the harnesses a few times