Series III 88. Young battery was dead. Would not take a charge even when removed from the vehicle and bench charged. Replaced the battery. Started the truck no problem. No charge light. Tested the new battery with a volt meter with vehicle running. It wasn't reading the expected 14v. It was 12.7v.

I have read that a dead charge light bulb could be the source of the charging problem.

Thoughts as to the source of the problem appreciated.