Rewiring sound system?
 

91 240sx se coupe

Do i have to rewire the entire set up to bypass factory amps or is there an easier way? I just kinda threw wires in for temporary sound from the rear (thru console and under the seat). Just got this car and dont really know my way around its internals yet. Also, whats the best way to wire for a sub amp in the trunk?

The light green wire on the back should be the ones that direct through all 4 amps. Just plug your CD player AMP wire (one with power all the time) and send it to that wire and it should do the trick. It works for me.

As for external amps for your case, direct wiring is the only way to go.

I got that amp wiring all figured out once i really took the time to look it over. what should i do as far as where to run wires for additional amp?

just run your av cables for the new amp into the head unit run your power wire and hook up the sub its easy just make sure you have you a good ground and always un hook the battery we forgot one time and i blew 2 12 com L7s yea that was an expensive woops...... Xtreme

Are you using a aftermarket head unit? If so then just pull the factory amps out and rewire. Would sound alot better and be alot easier. What wires are you talking about for the additional amp(power,RCA,etc), or all of the above?