[fintubi]

Thanks, Patrick.

The plug end of my tank harness is a 4-pole connector with 3 positions populated: B, W, and P. Since my car is a 289 with SW gauges, I'm presuming but have not yet verified that:

1. I have a 2-wire sender
2. The hot P wire is unused and insulated from ground at the tank end of the tank harness; and
3. W and B are connected to the sender signal and sender body respectively

But I haven't secured access to verify this yet.

If the connection of B to the sender body is missing or bad, then I'd see myself as susceptible to the same result that Chris saw when trying to get a single white signal wire to work with bad mechanical grounding from sender body to tank.

Bill