Battery getting drained randomly after driving '94 300ZX

[Cloud123]

I cannot for the life of me find out what is causing this drain. I have a '94 Z32 NA and the following is what I have crossed out so far:

-Checked battery slowly losing volts over a period of time so there is a confirmed parasitic drain
-Checked all fuses in and out of the car, nothing found that changes it in any manner
-Checked it with the aftermarket stereo unplugged, still happens
-No stuck lights on the car that I have noticed yet
-No loose wiring or corrosion as far as I have seen

I am thinking it may be a loose ground? I drive it sometimes and the battery decides to not drain some times while in the garage but when I resume driving it another day and park it, it will decide to drain out on me overnight. It is very random and ive been trying to find a resolution to this for a long time

If anyone has any documentation of ground locations or maybe additional points to check, it would help a ton. If all else fails ill probably have to look around for a shop that could help me find the root cause.

Thanks!

[NolimitZ32]

Its an amp draw which could be literally thousands of things and can be the biggest PITA to track down, you'll have to start checking different electrical systems until you find the one that's pulling current while parked and off.

[Ace2cool]

You could do it old school and just pull fuses and relays while it's parked and see if the drain continues. Any aftermarket electronics?

An easy fix if it's always in a garage would be a battery tender. But that's just basically putting a band aid on a cut that really needs stitches.