On 2003 Pathfinder a powered sub that goes in the back what's the power and speaker wires to the plug

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ECCS stands for Electronic Concentrated Control System, and this is a known issue.

https://www.google.com/search?q=Pathfinder+eccs+fuse

If fuses 'keep blowing', you need to find the reason why power is shorting to earth. In my view, you will need an auto-electrician.

Fuse box diagram Nissan Pathfinder and relay with ...

https://fuseandrelay.com > nissan > pathfinder
Description of fuse boxes and relays for Nissan Nissan Pathfinder R51 (3rd and 4th generation). Their photographs, diagrams, designations, locations

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The head unit should have a RCA Sub Out. The RCA wire goes to the Sub Amplifier, along with power, ground, and a blue remote wire from the Head Unit. Next, the Sub Amp is wired to the Subwoofer with speaker wire. Without an amplifier your sub won't make any noticeable sound.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

take it back i think the thing has had a brain storm and the output transistors have packed up

no problem with replacing all speakers with ones that are compatable wth you new amp .. and that means the the speaker impedance has to be wtihin the range of what the amp can drive (like 4 ohm, 8 ohm, 16 ohm) .... the subwoofer needs inputs from both left and right channels .. it also needs its own amplifier and low pass filter .. this all may be built into your after market amplifier .. if so you will have an output marked sub (that will directly drive the subwoofer) .. or you may have a low level outdput marked sub that goes to your subwoofer amplifier if it has one .. .. sometimes the woofer has its own built in amplifier and filter .. it then just needs power and inputs from each channel .. since you are running 500 watt speakers, they likely already have a subwoofer component .. (speakers that extend down to 20 hz or lower .) if so, you may not need an additional sub-woofer .. just make sure all the speakers are phased correctly .. (wired to work together not fighting each other ..) .... an amplifier capable of driving 500 watt speakers can draw peak currents that are very high .. so power wiring would have to be very heavy and preferably go directly to the battery with an inline fuse right at the battery ..

1995 Nissan Pathfinder Car Stereo Radio Wiring Diagram
Car Radio Constant 12V+ Wire: Pink
Car Radio Switched 12V+ Wire: Blue
Car Radio Ground Wire: Gray
Car Radio Illumination Wire: Red/Blue
Car Radio Dimmer Wire: Red/Yellow
Car Radio Antenna Trigger: N/A
Car Radio Amp Trigger Wire: N/A
Front Speakers Size: 5′ x 7′
Front Speakers Location: Doors
Left Front Speaker Wire (+): Pink
Left Front Speaker Wire (-): Blue
Right Front Speaker Wire (+): White
Right Front Speaker Wire (-): Black
Rear Speakers Size: 5′ x 7′
Rear Speakers Location: Roof Mount
Left Rear Speaker Wire (+): Light Green
Left Rear Speaker Wire (-): Purple
Right Rear Speaker Wire (+): Blue
Right Rear Speaker Wire (-): Pink

Check ALL the ground wires. Did you use a fuse block power source for the subs?

Look at the back speakers and you will see the colours on the connnections.(I am not familiar with American car wiring as i am in uk)

Hi, had total issues with this too! Your back speakers arent going because they are amped by the factory amp in the boot. You have to provide power to the amp so that it will turn the rear speakers on. This was a white and black striped wire in my car (Audi A3 1997) The rear speakers are blue /green and brown/red (left rear) , and the LH rear is brown/red and (forgotten colour) but the wire on the bottom left under those two brown/red wires on the 20pin harness. If you wire it all up like this then your rears should be going :)

if you are just annoyed with the noise, i could suggest that you just disconnect the speaker wire inside the engine compartment.

your alarm has an immobilizer and that would be a great help in case some one wants to steal your car.

but if you really want to remove your alarm, it would be just a matter of locating your alarm and disconnecting the fuse that powers it. it would normally be a red wire and there is a fuse in series with the wire.

you can trace your alarm by tracing back where the speaker wires came from. that box would be the alarm.

tnx 4 using fixya,

drcool