Cadillac Repair Questions? Ask a Mechanic for Answers ASAP
Here is the wiring diagram,
The fuse powers both though. Same ground also. I know it would be rare that both bulbs burnt out at the same time, but it's possible so I would start with using a voltmeter or 12 volt test light and begin testing at the bulb sockets. If you don't have a helper, just place a stick on the brake pedal and seat cushion, then adjust the seat to press the pedal down while you test.