where did my voltage go ?

[Trevini]

Andy

 

If you want to do a quick check to see if it's the reg/rec causing the drain, just disconnect the positive feed to the reg/rec off the battery (leaving everything else connected) and measure the voltage drop overnight again.  If it's less drop than your measurements above you may well have your answer.  If that proves to be the case, we can walk you through wiring up a relay to disconnect that wire when you turn the ignition off.

 

edit - just re read your earlier post - just take the fuse out, it'll serve the same purpose and save you disconnecting wiring.