"Connected the lights to an...Removed lights ... Still sets off alarm."
One of two things: Either the lights (the warning lights on the main panel, not the illumination lights on gauges, right?) are connected to the wrong place, or the senders are the wrong resistance. Usually these circuits are designed so that the resistance of the sender changes, and when it gets "too far" it also gets low enough to allow the lamp to light up. Without knowing the technical bits and the schematic, that's just a ballpark guess, but it WILL come down to one of two things:
Wrong senders, or wrong conection for the lamps. Do you have a schematic of the electrical system
, and can you work with that to find out where the lamps originally connected to?
And again...Wait till Monday, ask the company if they're familiar with this boat, they may have the answers right at hand. (Like, whether the senders are an exact replacement. I've been sold wrong parts
by Gen-You-Whine authorized dealers in the past, too.)