Classic/Antique Car Repair: 88 cutlass supreme classic, cutlass supreme, detective work

Question
wondering if voltage regulator is in alternator,also starter,battery,alternator tested good but battery dead every morning needing a jump

Answer
Hi Rick:
If she starts OK after driving, but battery is only dead after
setting overnight, I'm guessing there is a drain on the battery
while it is sitting. This could be a short or DC component still
on. You may need to do a little detective work to find the problem.
Start with testing all the lights and bulbs to make sure they are
not left on overnight.

Example...I had this problem a few years ago, and after several weeks,
I finally trace the problem down to my trunk light was not going out
when the trunk was closed. This was hard to discover since you can't
see into the trunk with the lid closed. Had to remove the back seat to
discover the light was still on when the lid was closed. Problem solved.

So, check the trunk light and all other light sources. Also check radio and
anything that run directly off the battery.