There have been a few questions on here about how to use an aftermarket amplifier, for using a sub-woofer or to amp speakers, with there exisiting OEM head unit.
Also within this guide i will be installing a "DICE - Silverline Pro" to intergrate my ipod into the standard OEM head unit.
On nearly all aftermarket HU's there are a number of RCA pre-outs for connecting to an amp, on standard HU's there is not this option. In this guide i will be using a 'speaker level to rca adapter' to give me an RCA pre-out from speaker wires
I have an E46 vert with the 'Business CD' head unit and a multichanger in the boot. This guide will work with all models and all HU's, you just may need to adapt for vehicle specific things, like trim removal
Tools you will need:
Equipment you will need:
- Screw drivers
- 8mm socket
- Trim removal tool (optional)
- Electrical tape
- Crim's and crim tool
Before you beggin, you may want to instal your amp or amps. My other guides may help you:
1. Connecting RCA adapter
2. Glove box removal
3. Installing and seting up the DICE
1. Connecting RCA adapter
This will be the same for any car
Im going to instal two rca adapters, but i will only show one here connecting to the rear speakers
you need to get access to the rear speaker wires, either behind the head unit or in the e46 (and i asume other models) you can find them under the rear seats
So firstly you will need to ID your speaker wires, speaker wires are normally colour coded they will be in pairs, ie, rear right speaker will have a +ive and -ive wire.
On my car they were twisted in pairs, i removed my head unit to find out what colours were
So now we need to ID what wires are what on our adapter:
On the adapter you have:
- left speaker +ive
- left speaker -ive
- right speaker +ive
- right speaker -ive
They are labeled so easy to do
So obvioulsy you need to match the wires up to the wires you id'd on your car, so left speaker +ive to left speaker +ive
On the E46 I removed the rear bench, and both left and right speaker cables can be round under the carpet just behind the door
This is where we use the scotch connectors, you could always finish them with a bit of electrical tape:
I then put my negative to a suitable ground on the car:
Some of you may have seen my thread about a ground loop, (alternator whine) with the negative connected like this i was getting a horrible loud alternator whine,
So i run the negative back to the HU and connected using a crimp lug like this,
No more ground loop issues
Now they are all connected up, you have one wire left the remote on. the remote on is a wire that connects to your amp it basically tells the amp to turn on and off with the HU, so the amp dosent drain your battery
This needs to be connected to a wire that goes back with your RCA's to the amp
The you will need to find a switched live (live that is only live when the key is turned) i found mine behind the head unit
So once they are all connected up you can plug your RCA's in:
As i was installing two of these, to run two amps i then installed the next one on the wireing for the front speakers
Turn the HU on and test
2.glove box removal (for an e46 but im sure you can work it out for other models)
To remove the glove box there are 6 phlips screws that need to be removed:
the glove box pulls up and out, put it on the floor.
3. Dice Instal
The Dice kit alows you to connect you ipod to your HU view the display of your ipod and control it through the HU and steering wheel controls. You need to habe a multi changer or the multi changer loom in place for this to work
In the box:
First off you need to decide where you want your ipod to go, you can put it in the main glove box, drivers glove box, center arm rest or anywhere else you can think of
The first part of the install will take place in the boot, you need to remove some of the carpet to get to where the multichanger wireing is
Remove the plastic tray, remove both expaning rivits:
you may find it easier if you remove the plastic tray:
Then remove these two expaning rivets:
Remove the boot light, the grey plastic clip releases it:
Now if you leaver the carpet at the edges you should be able to pull it foward out of the way, so you can get behind it at the cd changer:
The cd changer is bolted down, by these 4 8mm bolts, remove the bolts:
Dont forget the 5th bolt up here:
Now the cd changer is out, this is where the wires connect, unplug it:
Now you have two choices, put the cd changer back or leave it out, if you leave it out an amp would fit nicely there.
I put mine back.
Plug your 'DICE' lead into the the cd changer loom:
I checked that my dice works by quickly plugging it in here.
i ran the cable so it runs into the spare wheel well under the plastic
Now the dice instaltion instructions say that you need to remove the battery for proper instal, but im just going to pull the fuses for the radio, 7 and 21 (in the e46) but you can disconnect the bat if you wish
Next thing is you need to run the interface cable from the cd changer wireing in the boot to behind the dash (you could run it with your RCA'sif your running them to the front)
I have tried to avoid running this next to battery cables, in the E46 the battery cables are on the drivers side, so im going down the passenger side
Next you need to run your ipod interface cable to where you ipod is going to live, mines going in the driverside glove box, which is removed, by undoing these two screws:
I drilled a hole in the back at the top, and run my cable through it:
Ive now moved my ipod and i have it here now: 2004 E46 - My home made ipod soloution
Next i thread the cable above the HU and below the vents to the otherside of the dash,
So now its time to connect all your cables up,
In the glove box, connect your 'DICE' cd changer lead then the ipod interface lead into the 'DICE' box:
The 'Dice' box and any extra cable can be hidden here behind the glove box:
Now pop your fuses back in for the radio, or reconnect the battery, and test out your 'DICE'
If it all works as it should screw the HU into place put the glove box and trim back as it was and in the boot Put all the carpet back job done.
If anybody is intrested i will do a quick thread with a few pics of the dice in action,
As promised: http://www.bimmerforums.co.uk/forum/...42/#post652345
Thanks for looking, I hope this helps somebody. Dont forget if you find this useful dont forget to 'Thank'