When doing replacement or upgrading on 1966 – 1996 Ford Bronco II with 2 round headlamps rectangular, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

High Beam and Low Beam Headlight 1966 – 1977 6014
1987 – 1991 9004
1992 – 1996 9007
1979 – 1986 H6054
Front Fog Light 1995 – 1996 893
Back Up Light 1979 – 1991 1156
1972 – 1977 199
1992 – 1996 3156
Brake 1979 – 1987 1157
1966 – 1977 198
1988 – 1996 3157
Front Side Marker 1987 1157
1972 – 1977, 1979 – 1986 194
1992 – 1996 194NA
1988 – 1991 3157
Front Turn Signal 1979 – 1987 1157
1966 – 1977 198
1988 – 1996 3157
License Plate 1975 – 1977, 1979 – 1996 194
1966 – 1974 97
Parking Light 1979 – 1987 1157
1966 – 1977 198
1988 – 1991 3157
1992 – 1996 912
Rear Side Marker 1994 – 1996 3157
Rear Turn Signal 1979 – 1987 1157
1966 – 1977 198
1988 – 1996 3157
Tail Light 1979 – 1987 1157
1966 – 1977 198
1988 – 1996 3157
Luggage Compartment 1987 – 1996 912
Center High Mount Stop Light 1996 912
1992 – 1995 921
Courtesy 1966 – 1972 105
1988 – 1991 161
1973 – 1977 212-2
1979 – 1986, 1994 – 1996 561
1987, 1992 – 1993 912
Engine Compartment Light 1987 – 1996 912
Glove Box 1987 – 1996 194
Map Light 1987 – 1991 105
1979 – 1986 1895
1994 – 1996 561
1992 – 1993 906
Radio Display 1987 1893
High Beam and Low Beam Headlight 1978 6014
Back Up Light 1978 199
Brake 1978 198
Front Side Marker 1978 194
Front Turn Signal 1978 198
License Plate 1978 194
Parking Light 1978 198
Rear Turn Signal 1978 198
Tail Light 1978 198
High Beam and Low Beam Headlight 1978 H6054
Back Up Light 1978 199
Brake 1978 198
Front Side Marker 1978 194
Front Turn Signal 1978 198
License Plate 1978 194
Parking Light 1978 198
Rear Turn Signal 1978 198
Tail Light 1978 198
High Beam and Low Beam Headlight 1989 – 1990 9004
1984 – 1988 H6054
Back Up Light 1984 – 1988 1156
1989 – 1990 3156
Brake 1984 – 1990 1157
Front Side Marker 1984 – 1990 194
Front Turn Signal 1984 – 1987 1157
1988 – 1990 3157
License Plate 1984 – 1990 194
Parking Light 1984 – 1987 1157
1988 – 1990 3157
Rear Turn Signal 1984 – 1990 1157
Tail Light 1984 – 1990 1157
Luggage Compartment 1984 – 1987, 1989 – 1990 912
Courtesy 1989 – 1990 168
1984 – 1987 1816
1988 912
Glove Box 1984 – 1987 1891
1989 – 1990 194
Map Light 1984 – 1987 194
Radio Display 1984 – 1987 1893