Cadillac 1994 DeVille Owners Literature page 300

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Twist the socket counterclockwise and remove the socket and bulb
from the housing.
Replace the bulb, and reinstall.
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Position the windshield wipers on the windshield in the "mid" wipe
position. To do this, turn the ignition key to Accessory and turn the wipers
--on. Then
with the .door open,-turn-the ignition key to off.
Startwith the dr;iver side wiper blade,assembly.
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