Somethings bad?

Dont worry about,fix it and get rid of the problems,amp guage for one!I went through all this last year on mine,not the problems you have,but another problem child.I justed started over,40 yr wiring i'm sure it was ready to be replaced anyways,and i have peace of mind now.

Have your alt. and regulator checked too at a parts store,just to make sure they were not damaged.And take your bulkhead connector apart,more then likely you will find a problem there for what you have going on.

And again,do a search here,tons of useful information and most will walk you through step by step.Doesnt hurt to have a service manual handy either!
Good luck!