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Hi, I'm assuming that you have standard halogen light bulbs. To replace the bulb you need to open the hood and remove the large cover on the back of the lamp by rotating it counterclockwise the grasp the connector on the bulb and rotate it counterclockwise to remove the bulb then unplug the bulb from the connector and plug in your new bulb and reverse the procedure to install.
Let me know if you have any questions.