Control Unit Connector

On all models, turn ignition on and check for voltage at control unit connector Blue wire. There should be voltage. If there is no voltage, check Blue wire between ignition coil and control unit.
On all models, turn ignition on and check for voltage at control unit connector Black/Yellow wire. There should be voltage. If there is no voltage, check wiring and ignition fuse.
Check Brown/Black (Prelude models) wire for continuity between control unit and body ground. There should be continuity.