you may have either an internal or external regulated alternator, if it still has the original generator style regulator [3 terminals], with an internally regulated alternator, the regulator is just a junction box, if you have an externally regulated alternator with the correct regulator [4 terminals], it controls the charging activity and could be defective

you might also put a charger on the battery and see if it's been run down after your fiddling or if still has a good state of charge

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics