i think this model has a line of bulbs in it ,the later ones use LCDs ,if its the later type then its a complete unit.Most likely if its the early type their will be either a clipor grub screws either side of the unit
98 LS400 PWR MIRROR-PWR DOOR LOCKS -AUTO HEADLAMPS -AUTO TILT -DOMES LAMPS INOP --ALL FUSES GOOD...
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98 LS400 PWR MIRROR-PWR DOOR LOCKS -AUTO HEADLAMPS -AUTO TILT -DOMES LAMPS INOP --ALL FUSES GOOD --CAN TURN SOME ITEMS ON BUT AUTO SIDE IS DEAD ANY ADVISE ????