'93 Regal Custom problem with a fuse

I have a 1993 Buick Regal Custom. Something is causing a constant drain on my battery. We have narrowed the problem to the 30 Amp fuse on the left side of the engine compartment and think the problem may lie in the ECM. Does anyone know exactly what this fuse goes to. If someone could tell me, we could continue our search of the problem and get it fixed. Thank you.

Welcome to AF

I assume this fuse is in the underhood fuse/relay center. There should be a legend on the underside of the fuse/relay center cover that tells what each fuse controls.

Thanks for the welcome. No, the legend only tells what the 10 and 15 Amp fdses are for, but not the 30 Amp or 60 Amp fuses. I know this 30 Amp fuse causes the drain, because we put a test light on the battery, and when this fuse is taken out, the drain is no longer applied to the battery. I was a mechanic in Iraq for a year, so Im confident if I know what this fuse goes to, I can fix the problem, I just cant find the info online.