For Installing an aftermarket car radioWires are color coded to match you new aftermarket radio - Carxtc wiring makes your installation quicker No need to tap or cut into factory harness Match color wire to same color on new radio harness Plugs into car harness and then other end into new radio. Fits DODGE PICKUP FULLSIZE 1974 to 1993 1974 1975 1976 1977 1978 1979 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 74 75 76 77 78 79 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93