Question Car stereo/amplifier issues

Feb 28, 2019
Really need assistance...been out of the stereo game for awhile. I got a new Pioneer deck for my car and hooked it up like the instructions explained via the wiring harness and rca's that have been connected and never removed to both amps I have. So when I turned the car on to see if everything was operating correctly the music played for about 30 seconds then suddenly everything went out with an amp error coming onto the deck's screen. I took the rca's out and I was getting sound from the front/door speakers only which makes sense since I don't have them wired to the amplifier, just to the deck. However, when I hooked the rca's back up to the the amp running the rear speakers my front speakers have no sound coming from them. After 30 seconds the music stopped again and I got the same error message. I opted to disconnect the amp running the rear speakers and just connect the rca's running to the subwoofer amp and the same thing occurred.
A) why would my front speakers stop working when the amp is connected?
B) how do I get my amps to stay on without cutting out?

Any help in this matter would be greatly appreciated!!!
What happens if you disconnect the internal amp from speakers and just run the external amps alone?
I don't think the headunit can indicate a problem with the outboard amps. The error message probably refers to the internal amp.
If it only happens at high volume maybe the headunit is overloading the input of the amps?
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