sorry in advance if this has already been answered (i've searched... i swear).

my bro gave me his 03 5at coupe with the bose premium package. i'm looking to replace the bose amp in the trunk with a pg r8.0:4 or jl 300/4. since i'm going to be removing the bose amp altogether, is there a way for me to use the existing power that feeds the bose amp to power my new amp?

i took a look at the wiring diagrams and found that the battery power comes goes through fuse 37 (15a) via the y/r wire.

does anyone know what gauge the y/r wire is? also, is it possible to somehow swap fuse 37 with one that has higher current rating (say a 40a?)?

i'm really trying to minimize removing panels.

 

You can swap the fuse with whatever you want
Just find suitably fitting one

I personally wouldnt trust the stock wiring; its most likely light gauge

 

it is possible?
yes
i'm doing that right now, powering a 350W Alpine MRD-M301 and a 400W Rockford Fosgate P310D4 using the wire that powers the OEM Bose amp.

I haven't run into any problems since I installed it this way about a week ago.

However, I am not comfortable with this wiring solution, so in about a week, I am going to run AWG4 and AWG8 cables straight from my battery.

 

yes its possible for power,ground, and remote.
I'm not sure how much current you can safely get though. I wouldn't do it.

 

I wouldn't recommend it and never put a bigger fuse in that will allow you to pull more current then what the car was designed for. Thats a sure fire way for bad things. It will probably work, but if you are pulling too much current it will cause the wire to heat up a lot. The best thing that can eventually happen is that you will just burn up the wire itself and have to replace it, hopefully not burning up other important ones around it. The worst thing that could happen is that you burn your whole car down.

 

Don't Do It!!

 

i guess i have no choice but to get off my lazy **** and run a new power line straight from the battery...

thanks for the warning guys. you probably saved me some major cash in repairs.

 

With the amperage in your cars electrical system you could almost arc weld. If one of those wires over heats and melts off the insulation, there could be some serious problems.

 

Running the power the back is not that hard. The only hard part is dropping the 4awg wire down into the passenger side... ripping apart the side of the car is not that hard either, most of everything is held by snap-ons, clips, and 1 or 2 bolts.

I ran my power into a distribution block (while you're doing it anyways) from my 4AWG into 4, 8AWG for future upgradability. The rear seats pop right up and you can just tuck all the power cables there.

From there, it's really easy to do a stealth install for the amp/wire/etc to the bose amp area to the left of the spare. (3 bolts hold that plastic bose amp cover).

If you're gonna do it, might as well do it right and with good gauge wires.

Good luck...