[Richard L]

Can you please check the following for me:

1. At pre-crank position without starting the engine. Does the "S" and back-lit led light up after the start-up timer lasped. (water level led goes out)
2. After cranking and engine running, does the back-lit led lights up?
3. Engine still idling, can you see the flicker on the green F-IDC led on the circuit board? 4. If so, does it flicker in time with engine speed?

May be it is easier for me to give you a call can do some real time testing during this week end? If this is possible, pm me your phone number.