LACU pushbuttons can be akward to see if they are depressed or not. However over time you'll get the hang of it, and you can notice them depressed.
FLOATS and F.PUMP have lights on the buttons to indicte the system is on or armed. BATT, GENE, PITOT, HYDR etc will effect a CWP caption. A.COL, POS LTS, V/A SELECT and ELECT. RESET won't.
TiP