2005 tahoe amp & subwoofer addition

[Donnie51]

I just bought a 2005 chevy tahoe and I tried to wire up two 10" jbl 1000watt subs in parallel with an Autotek m4000 amp. I've got a little experience wiring subs and I've wired my own in a 2000 impala but I wired these ones and they do not work, the owner before me wired up a touch screen deck(Iva-w200 alpine I believe) and I plugged my RCA cables into the back of that and tied my turn on wire into the wiring harness one. I have the power cable tied off the alternator power and I have it grounded to the back seat. Does anyone have any idea of what I've done wrong or can try? I also bought a line out convertor but I don't know if I still need this with the aftermarket deck/ have to use this.

 

[NicWoody]

I'm sorry but I can't help you with that problem, but do you know what color wires do I hook the converter up to?

 

[Donnie51]

It turned out to be a bad amp

 

[NicWoody]

Do anyone know the colors of the wires running to the amp for the back two speakers