Honda BF20A-BF25A, BF25D-BF30D Outboard Motors Shop Manual., Page 196Get this manual
OIL PRESSURE SWITCH 1) Remove the oil pressure switch wire
2) Attach the tester leads the terminal joint and switch body and check for continuityThere should be continuity
OIL PRESSURE SWITCH
OIL PRESSURE SWITCH WIRE
PULSER COIL
It is not necessary remove the coil: Remove the engine cover and disconnect the pulser coil connector from the right side of the engine (P6-21
Attach the tester lead to each terminal and measure the resistance between the terminalsPC1 (Bu) GND (Bl) 290- 355
PC3 (BuIG) 290- 355