1970 Johnson 115 HP Outboard Motor Service manual, Page 94Get this manual
CHARGING CIRCUIT TROUBLESHOOTING STEP1
=,I ,+ lZVCLT BATTERY
UNDER CHARGED BATTERY
AMMETER
IGNITION
aCheCk condition of batterySee Specifications Section 7
AMMETER
b, Check all cormectlons
They must be tight &
TO ACCESSORIES