240z which fuse box circuits should see 12v when key is off?

[adivin]

Mystery is solved.  I thought for sure it was the horn relay, but it wasn't.  The problem was the connection for the horn in the steering wheel.  Many moons ago when the car was being prepped for an ITS track car, I put a Sparco steering wheel on and apparently left the horn connection just dangling inside.  Sure enough this was the cause of the drain.  Steve, thank you so much for your help.  You were a big help, especially when you kept asking me if I knew how to use an ammeter lol.  

[SteveJ]

Good job tracking it down. I can only point you in the right direction. You have to put the effort into it to find the root cause.