When doing replacement or upgrading on 1987 – 1992 Cadillac Brougham, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 1990 – 1992 9004
1987 – 1989 H4656
High Beam Headlight 1990 – 1992 9004
1987 – 1989 H4651
Back Up Light 1987 – 1992 1156
Brake 1987 – 1989 2057
1990 – 1992 3057
Dome Light 1990 – 1992 561
1988 – 1989 912
Front Side Marker 1990 – 1992 194
1987 – 1989 194NA
Front Turn Signal 1987 – 1989 1157
1990 – 1992 2057
License Plate 1987 – 1992 194
Parking Light 1987 – 1989 1157
1990 – 1992 2057NA
Rear Side Marker 1987 – 1989 194
1990 – 1992 24
Rear Turn Signal 1987 – 1989 2057
1990 – 1992 3057
Tail Light 1987 – 1989 2057
1990 – 1992 3057
Center High Mount Stop Light 1987 – 1992 1156
Courtesy 1989 168
1990 – 1992 561
1987 – 1988 562
Engine Compartment Light 1987 – 1992 1156
Glove Box 1991 1816
1992 194
Map Light 1987 – 1988 1004
1990 – 1992 561
1989 912
Trunk 1987 – 1992 1003