In this paper, position vector of a time-like slant helix with respect to standard frame of Minkowski space E 3 1 is studied in terms of Frenet equations. First, a vector differential equation of third order is constructed to determine position vector of an arbitrary timelike slant helix. In terms of solution, we determine the parametric representation of the slant helices from the intrinsic equations. Thereafter, we apply this method to find the representation of a time-like Salkowski and time-like anti-Salkowski curves as examples of a slant helices, by means of intrinsic equations. Moreover, we present some new characterizations of slant helices and illustrate some examples of our main results.