Help installing pioneer head unit into aust. 96 magna TE?

do they not sell a harnest wire kit for your car this is the proper way to connect a aftermarket head unit has all the wires you need just twist crimp and plung in check your car radio fuze,check your head unit fuze, and do you have the remote wired hooked up and the ground,grounded proper ,but a harness kit should solve the problem