I've got an Auto Meter electric speedo and Ford's OEM sender:
Auto Meter's instructions say to route one of the sender's wires to ground and the other to the "Signal" terminal on the speedo.
Problem is, both of the sender's wires are white and the instructions don't refer to wire color.
Can I assume that wire choice doesn't matter and just arbitrarily pick one for signal and the other for ground?

Auto Meter's instructions say to route one of the sender's wires to ground and the other to the "Signal" terminal on the speedo.
Problem is, both of the sender's wires are white and the instructions don't refer to wire color.
Can I assume that wire choice doesn't matter and just arbitrarily pick one for signal and the other for ground?