80's Fuel Gauge Sender Wire Size/Color

[joed]

For a project I am working on, I got hold of a fuel tank from an 82 diesel blazer, and am wondering what gauge wire I should use to splice to the sending unit?

I'm assuming the size would affect resistance, and therefore gauge readings? Looks like it's 16 or 18 gauge?

Also, the sender has 3 wires coming out of it - is the largest one for the gauge?

They all appear to be white.

Thanks in advance.

Joe.

[JohnC]

The resistance of the wire is insignificant compared to the resistance of the sender. Either 16 or 18 will be fine. 20 would work, but isn't that strong mechanically.

[joed]

Anyone know if the sending unit needs to have a ground wire in addition to the gauge sender wire?

I was guessing the tank itself provided the ground?

I ask because my Blazer tank sending unit has 3 wires coming out - I was thinking the other 2 were for the water in fuel sensor (1982, older WIF setup)?

Or is one for a ground, one for WIF, and the other for the fuel gauge?

Thanks.

Joe.