I have a 99 4runner and will install a aftermarket Hu and don't want to cut any wires,I will buy a harness plug.I know the 4runner has a stock amp. but I want to know if I have to unplug the factory amp or i can leave it alone since I will wire my speakers to a 4 channel amp.It's the first time im going to do it on a 4runner.I just install the harness or there is something else I should know.Any help woul be good
