Where is the starter enable relay located on a 1998 Oldsmobile 88 LS?

It's probably part of the starter itself. Look to see where the BIG positive wire from the battery goes. I'll bet it goes to a little cylinder that is part of the starter. This little cylinder is the relay and starter solenoid that engages the starter gear into the flexplate as it closes the relay to the starter to turn the engine over. TommyTrouble