89 Tbird Electrical Schematics Needed Please!

I need more detailed electrical schematics for a 1989 Thunderbird. The battery keeps losing charge. Both the battery & the alternator are in good shape - have had both tested.

Still can't figure out problem, so need more detailed schematics than what is in the Haynes repair manual.

Any help would be appreciated!
Thanks!

disconnect the negative battery cable and connect a test lamp between the cable and the battery post.unplug the connector at the altenator. if it dims thats your problemand if not start pulling fuses until it does to find the circuit thats cuasing the drain.