Chased the 3 wires that I had left.
They make me think Chevy is retarded
It's 3 wires in a plug.... Running into the wire bundle.
One goes to the lift pump plug like I thought.
It stops there under the driver's seat, and the other wire in the lift pump plug runs ALL the way back to the fuel tank and lands on the frame by it's self....
The second wire in the mystery plug runs all the way back to the fuel tank sender plug, but appears to be a ground. Beings that it's black with white stripe like a bunch of the other system grounds.
Other wire in the sender plug runs up into the firewall plug and into the dash.
3rd wire in the mystery plug is a light green that goes all the way to the jumble of wires at the tail where all the lights branch off, and I haven't finished tracing it yet.
It's odd that there'd be a big 3 wire plug separate from the others that have seemingly unrelated wires in it.
Then the odd lift pump ground that runs half the length of the truck, just to ground on the frame all by it's self. That wire would have been fine if it was a foot long.
And I'm not positive how the level sender wires work in this, but I thought fuel gauges had 12v to the gauge, through it all the way to the sender, through it, and to ground. And the resistance to ground operated the gauge....
If so, how come the ground runs all the way back to the front of the truck....?
I'm an electrician by trade, and I'm told a good one.
But I fuggin hate auto wiring, because most of it makes no damn sense to me lol.