Help! trouble shooting wiring.

[Ghernandez66]

I'm having some electrical issues with my 66 and would like to get some help on how to troubleshoot it or where to start.

The issue is that somewhere the wiring is draining my battery overnight, I can jump start the truck and it will start and charge the battery and if I drive it around town it will start just fine but when it sits overnight its dead again unless I disconnect the battery then it holds charge.

So is there any way to find out what wire is pulling power once the switch is off?

the alternator has been converted to an internal regulated one all I did was jump the leads at the connector where the external regulator was I did some research here for that.

Hope this info helps you guys help me.

Thanks in advance