Gauge turns off after car is started

[Gatehouse]

Hey guys,

Just realized after having the system installed and waiting for a tuner, that when I start the car with the system activated via the gauge button, nothing lights up.

If I turn the system off when the car is still running, I get the 'water level' light, indicating that the system is off.

If I leave the car in the pre-crank position, I can activate the system via the 'sys' jumper to test/purge and all the gauge lights work correctly.

All failsafes are bypassed via the jumper.

Not sure If I tapped into the wrong wire on the ECU harness, I followed the diagram for the 2011 Subaru STi.

Car is a 2013 Subaru WRX STi.

Edit:

F-IDC Lights work when the system is at pre-crank and when the car is started. The lights blink faster when more throttle is input.
95% Lights at pre-crank as well.
Not too sure about the 'thres' lights.

[Gatehouse]

anddddd i figured it out ... :|

[Richard L]

empty tank?

[dlheman]

I am having the same problem I think.

If I unplugged the blue harness water level then the gauge would lid up, but if I plug it back on then the gauge would turn off after few seconds.

How do I solve this?

[Richard L]

Unplug the level sensor and tell me if it does the same again.

[dlheman]

Oh nevermind, I got it working!

Just it took awhile for the water to flow to the other tank (using dual 1 gallon from Jeff) where the float sensor is.