New head unit says miswiring

[Cheetokps]

Hello, I just installed my new JVC head unit. I tested it and it worked, so I then installed my new sound ordnance 4 channel amp. Now when I start it I get a message saying “miswiring”. I have the amp connected to the head unit with a 4-way rca cable. I thought it was a ground but I put it on the same ground as my subwoofer, which works.

For the speaker outputs I have it spliced into the existing wiring harness. I was wondering if this was my problem, do I need to cut the original wires from the harness and atattch the ones from the amp instead? That wiring would already be receiving the output signal from the head unit, so adding in the output from the amp further down might not work I would think.

 

[IOwnCalculus]

Yes, you can't drive a speaker from both the head unit's output and the amp's output at the same time. If you're only using the head unit to feed the amp at line-level, you should disconnect and isolate all of the speaker-level outputs at the head unit.

 

[Cheetokps]

Yes, you can't drive a speaker from both the head unit's output and the amp's output at the same time. If you're only using the head unit to feed the amp at line-level, you should disconnect and isolate all of the speaker-level outputs at the head unit.

That’s what I figured, I just wanted to make sure before I cut the factory harness

 

[Wingback73]

Why are you cutting the factory harness? Do they not make a Metra adapter you can use? Much cleaner and easier to deal with if you have to take the unit out of the vehicle...

And yes, speakers can only receive a single input. Although more importantly, if you've connected both your head unit and amplifier speaker outputs to the speakers, what you are really doing is sending the amplified signal back INTO the head unit through the speaker OUTPUTS. So just don't connect those to anything any you are all set. If you use an adapter for the head unit you simply don't connect those wires together. Bring the outputs from the amplifier back up behind the dash and connect them into the Metra adapter (instead of the ones from the head unit) and just plug it into the factory wiring harness.

 

[Cheetokps]

Why are you cutting the factory harness? Do they not make a Metra adapter you can use? Much cleaner and easier to deal with if you have to take the unit out of the vehicle...

And yes, speakers can only receive a single input. Although more importantly, if you've connected both your head unit and amplifier speaker outputs to the speakers, what you are really doing is sending the amplified signal back INTO the head unit through the speaker OUTPUTS. So just don't connect those to anything any you are all set. If you use an adapter for the head unit you simply don't connect those wires together. Bring the outputs from the amplifier back up behind the dash and connect them into the Metra adapter (instead of the ones from the head unit) and just plug it into the factory wiring harness.

I do have an adapter, I was only cutting into it for the amp outputs. I hadn’t thought it through well enough to think to do that and not have to do any cutting, that definitely sounds much cleaner

 

[Cheetokps]

My speaker and amp are working now, except I’m having an issue where every time I pause/skip/change channel or anything to stop the signal, I hear a loud popping noise in my speakers. Crutchfield is sending me a new amp but I’m not convinced it’ll help, I tried changing grounds and it was still there. Anyone have any experience with this issue?

It doesn’t do it between songs/pausing through Bluetooth, just usb, fm, etc. I hear a faint static noise when on Bluetooth with nothing playing, I figured this is why it doesn’t pop because the signal isn’t completely stopping

 

[Wingback73]

I've never heard of anything like that. If I were to pick a problem, I would guess it is the head unit, not the amp