When doing replacement or upgrading on 1974 – 1988 Jeep J20 J10, 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 1974 – 1978 6014
1979 – 1988 H6054
Back Up Light 1979 – 1988 1156
1974 – 1978 199
Brake 1988 1156
1979 – 1987 1157
1974 – 1978 198
Front Side Marker 1983 – 1984 158
1974 – 1982, 1985 – 1988 194
Front Turn Signal 1979 – 1988 1157
1974 – 1978 198
License Plate 1985 – 1988 67
1974 – 1984 97
Parking Light 1979 – 1988 1157
1974 – 1978 198
Rear Side Marker 1983 – 1984 194
Rear Turn Signal 1979 – 1988 1157
1974 – 1978 198
Tail Light 1988 1156
1979 – 1987 1157
1974 – 1978 198
Courtesy 1985 – 1987 105
1988 211-2
1974 – 1978, 1980 – 1984 212-2
1979 74
Glove Box 1988 1891
Map Light 1988 105
Radio Display 1985 – 1987 1892
High Beam and Low Beam Headlight 1974 – 1978 6014
1979 – 1988 H6054
Back Up Light 1979 – 1988 1156
1974 – 1978 199
Brake 1988 1156
1979 – 1987 1157
1974 – 1978 198
Front Side Marker 1983 – 1984 158
1974 – 1982, 1985 – 1988 194
Front Turn Signal 1979 – 1988 1157
1974 – 1978 198
License Plate 1985 – 1988 67
1974 – 1984 97
Parking Light 1979 – 1988 1157
1974 – 1978 198
Rear Side Marker 1983 – 1984 194
Rear Turn Signal 1979 – 1988 1157
1974 – 1978 198
Tail Light 1988 1156
1979 – 1987 1157
1974 – 1978 198
Courtesy 1985 – 1987 105
1988 211-2
1974 – 1978, 1980 – 1984 212-2
1979 74
Glove Box 1988 1891
Map Light 1988 105
Radio Display 1985 – 1987 1892