Q: 12.3 voltes on 1993 Ford E-350

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
is that enough voltes to start a ford e350 ambulance
(2) Answers
most diesels have two batteries because it takes more juice to start them you never said if were having a problem starting if you do load test the battery to see if it holds voltage