1985 Mercury Outboard V-300 V-3.4L Shop Service Manual, Page 212Get this manual
CIRCUIT BREAKER TEST NOTE: The circuil breaker is nonfunctional when side mount remote control (supplied with engine) is used Check to see if circuil breaker reset lab is exposedReset lab is located on the bollom of the circ uit breakerIf reset lab is exposed, push the lab into the circu il breaker to rese tReset lab must NOT be exposed when perfor ming Ihe fo llowing voltage checks
Use Voltmeter to check for vol tage al term inal IIf no battery voltage is indicated at term inall, there isan open
c rcui in cable bel ween terminal Bnd pos iti ve (+) baucry
postBattery volt age must be indicated at te rminal before performing Ihe next check