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 Headlight1990 – 1992 9004
1987 – 1989 H4656
High Beam Headlight1990 – 1992 9004
1987 – 1989 H4651
Back Up Light1987 – 1992 1156
Brake1987 – 1989 2057
1990 – 1992 3057
Dome Light1990 – 1992 561
1988 – 1989 912
Front Side Marker1990 – 1992 194
1987 – 1989 194NA
Front Turn Signal1987 – 1989 1157
1990 – 1992 2057
License Plate1987 – 1992 194
Parking Light1987 – 1989 1157
1990 – 1992 2057NA
Rear Side Marker1987 – 1989 194
1990 – 1992 24
Rear Turn Signal1987 – 1989 2057
1990 – 1992 3057
Tail Light1987 – 1989 2057
1990 – 1992 3057
Center High Mount Stop Light1987 – 1992 1156
Courtesy1989 168
1990 – 1992 561
1987 – 1988 562
Engine Compartment Light1987 – 1992 1156
Glove Box1991 1816
1992 194
Map Light1987 – 1988 1004
1990 – 1992 561
1989 912
Trunk1987 – 1992 1003