How can you check on a 1990 Oldsmobile Cutlass Cerria SW 6cyl fuel injected for an electrical short on the battery when the car is not running?

Disconect the negative terminal & put a test light in line-& start pulling fuses until the test light goes out.when U get 2 the fuse that turns out the test light-THAT is the Circuit u start 2 trace.make sure the light is inlne-NOT having the battery cable touching the battery post.just the light - inline.