Honda BF115A, BF130A Outboard Motors Shop Manual., Page 377Get this manual
HON,DA BFI 15AaI 30A
INDICATOR LIGHT [MIL, ALTERNATOR INDICATOR LIGHT1
Use known-good battery for the testRoute the indicator light cable as shownConnect the switch to the redlblue terminal and the switch the whitelblue terminals respectively, and apply the 12V voltageSwitch ON: Alternator indicator light should be ONSwitch ON: MIL should be ON121 MIL
111 ALTERNATOR
171 Switch 1
PULSER COIL
Measure the resistance between the terminals shownResistance between GrayWhite and BrownlRed
BrownBlue
121 BrownIRed