Extremely Confused on whats wrong!

[Black Truck 10 10+ year member]

Hey yall I had 2 sundown 1000/2s connected together as well as a Sundown 300.4. I also have a truckputer that I put in. I have 2 batteries wired in parallel I believe. I have a positive and negative running from one battery to the next. The battery under my hood recently went bad so I got a new battery put in. Just a standard interstate battery.

Since putting in the new battery my saz 300.4 wont turn on, and my carputer screen wont turn on. The weird thing is my alpine 7995 head unit turns on and my 2 sub amps turn on yet the subs are not playing any bass at all?

They all share the same remote turn on wire and the back battery runs all of my amplifiers. While the front battery runs the tv monitor and the head unit. The fuses are fine on all of the wires. What could be causing my monitor to not work as well as my 300.4

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[misfit138 5,000+ posts]

Couple questions.

What's a Sundown 1000/2?

What's a Sundown 300.4?

 

[brian84corvette 10+ year member]

did you check for power at the remote turn on with your Digital Multi Meter ?

go around poking at the wires to figure out what does not have power that should.

then back track the wiring to figure out where it is not hooked up anymore.

also check both of your cars fuze boxes for any blown fuses. there might be one in the cab /and one under the hood

 

[1rockford1 5,000+ posts]

im thinking a fuse went bad or is on its way out.

 

[Black Truck 10 10+ year member]

Couple questions.
What's a Sundown 1000/2?

What's a Sundown 300.4?

I meant 1000D and then 100.4 I guess! I couldnt remember what the model was. Ill have to pull out the multimeter and verify the remote wires all have power but they did prior to the battery being changed out so I assumed the wires are fine. I will check the trucks fuses thats something I didnt check.

 

[FenixAudio 10+ year member]

Check voltage at amp and decks amp to wire, also if u are running more then 2 amps you should use a relay to turn them on...if the monitor is connected to the amp to wire you def need a relay. Use a meter, also a prior post stated a fuse might be on its way out...fuses either blow or don't....forget the factory fuses also unless something factory isn't working. I'm gonna bet you need more current to run the third amp...just check your voltage and go from there