1. Get your $$ back from the indy if they didn't fix the problem. Or pay me 1/2 price and I won't fix it either.
2. Connect your ammeter between - battery post and cable. How many amps is the drain?
3. IF you have a documented drain as measured by excessive amps, pull fuses until you isolate the circuit.
4. Identify then disconnect individual items (loads) on the circuit until you identify the problem.

Question: What specifically makes you think that the battery and alt are good? You need to be CERTAIN that both are good before looking for a drain. Lots more info available online but post back your findings.

__________________
85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.