Cadillac 2000 Seville Owner's Manual page 312

6. Remove the headlamp bulb socket.
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7. After removing the wiring harness connector from
the headlamp bulb socket, replace the bulb assembly.
Reconnect it to the wiring harness and reinstall
the headlamp bulb assembly back into the
headlamp housing.
8. After reinstalling the bulb and socket, reinstall
the rubber cover. Make sure it fully covers the
headlamp socket.
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9. To replace the high beam bulb, turn the bulb socket
counterclockwise to unlock the socket from the lamp
housing. Follow the instructions in Step 6 through 8
to install the new bulb.