[Richard L]

Your post has helped with the diagnosis greatly, thnak you. OK, system is working logically as the power wires are being reloacted, good to move the the next stage.

It appears the water level sensor is the problem area. please check the following:

1. The lever arm of the flow sensor must point upwards when the tank is fully filled. If not, rotate it 180 degrees.
2. Check the wiring order of the 4-pin blue RJ connector. The colour order should be red, green, orange, white, yellow, blue, black and brown counting from the gauge harness side.

PS I saw the pictures you posted of the car, awesome racer and will upset a few people on the highway.