When doing replacement or upgrading on 1958 – 2005 Ford Thunderbird, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 1989 – 1993 9006
1983 – 1986 H4656
1958 – 1976 H5006
High Beam Headlight 1989 – 1993 9005
1983 – 1986 H4651
1958 – 1976 H5001
High Beam and Low Beam Headlight 1987 – 1988 9004
1994 – 1997, 2002 – 2005 9007
1977 – 1979 H6024
1980 – 1982 H6054
Front Fog Light 1990 – 1991 880
1992 – 1997 893
1987 – 1989 H3-55W
Back Up Light 1963 – 1967 1076
1958 1141
1959 – 1962, 1968 – 1973, 1976 – 1988 1156
1989 – 1997, 2002 – 2005 3156
Brake 1958, 1960 – 1961 1034
1959, 1962 – 1982, 1985 – 1986 1157
1983 – 1984 2057
1987 – 1991, 1995 – 1996, 2002 – 2005 3157
1992 – 1994, 1997 3357
Dome Light 1961 – 1965, 1969 – 1970 1003
1959 1004
1966 – 1968 1816
1974 – 1975, 1979 211-2
1972 – 1973, 1976 – 1978, 1981 561
2002 – 2005 578
1980, 1982 – 1997 912
Front Side Marker 1972 – 1980, 1983 – 1986, 2002 – 2005 194
1970 – 1971, 1981 – 1982 194NA
1989 – 1997 3157
Front Turn Signal 1958 – 1986 1157
1987 – 1988 2357NA
1989 – 1997 3157NA
2002 – 2005 3457NA
License Plate 1963 – 1967 1155
1977 – 1984, 2002 – 2005 168
1985 – 1997 194
1958 – 1962 67
1968 – 1976 97
Parking Light 1958 1034
1959 – 1971, 1973 – 1976, 1979 – 1986 1157
1972, 1977 – 1978 1157NA
1987 – 1988 2357
1989 – 1997 3157NA
2002 – 2005 3357NA
Rear Side Marker 1979 161
1981 168
1969 – 1978, 1980, 1982 – 1986, 2002 – 2005 194
1989 – 1994, 1996 – 1997 3157
1987 904
1988 912
Rear Turn Signal 1962 1034
1958 – 1961, 1963 – 1982, 1985 – 1986 1157
1983 – 1984 2057
1987 – 1997, 2002 – 2005 3157
Tail Light 1958 – 1962 1034
1963 – 1973, 1977, 1980 – 1982, 1985 – 1986 1157
1974 – 1976, 1978 – 1979 168
1983 – 1984 2057
1987 – 1997, 2002 – 2005 3157
Center High Mount Stop Light 1986 – 1988 912
1989 – 1997 921
Courtesy 1962 – 1967 1004
1982, 1992 – 1993 105
1972 1445
1979 – 1981 161
1973, 1988 – 1991, 1994 – 1997, 2002 – 2005 168
1968 – 1969 211-2
1970 – 1971, 1974 – 1978 212-2
1987 89
1985 912
Engine Compartment Light 1963 – 1970 631
1962, 1973 – 1987 89
1989 – 1997 906
Glove Box 1979 – 1981, 1983 – 1986 1816
1969 – 1972 1895
1973 – 1978, 1982, 1987 – 1997 194
1961 – 1962 57
1963 – 1968 631
Map Light 1973 – 1977, 1979 1003
1980 – 1981, 1983 – 1991, 1994 – 1997 105
1992 – 1993 168
1968 1816
1969 – 1970, 1978 212-2
1971 – 1972 578
1963 – 1967 631
1958 – 1962 89
1982 912
Radio Display 1959 – 1961 1891
1965 – 1967, 1980 1892
1962 – 1964, 1968 – 1969, 1972 – 1978, 1981 – 1986 1893
1970 – 1971 1895
1979 37
Trunk 2002 – 2005 212-2
1963 – 1971 631
1961 – 1962, 1972 – 1987 89
1989, 1992 – 1994 906
1990 – 1991, 1995 – 1997 912