1. Locate the carpeting on the left of the truck.
If you are lucky and have an M5, you have an optional storage
compartment
2. Remove the 1/4 turn screw (other than M5) and remove the
side carpeting. |
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2. Remove the bottom carpeting too, locate the
amplifier/crossover and remove the 4 phillips screws.
3. Now you have two choices, you can tap the wires or if you
want the best sound, you can remove the wires make a nice split. |
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Left Pic: Detail of connector with strain relief detached.
Right Pic: Detail of other side of connector.
4. You have to tap on the signals from the radio at the amp:
(Wire colors depends on Bmw year)
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Rear Left (+): Yell/Blue (Yellow Black)
Rear Left (-): Yellow/Grey (Grey or Brn/Orange)
Remote power for new amp: White |
Rear Right (+): Blue/Violet (Blue/Black)
Rear Right (-): Blue/Grey (Blue or Brn/Orange) |
| 5. You might need to strip some of the factory
harness tape to allow enough play in the factory wiring to attach
the big wire taps (or the splice). |
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6. You can use a short piece (around 8") of Left/Right
RCA wire (RCA cable with individually insulated +/- wires
as opposed to an RCA with the ground shield woven around the
outside of the + wire) for the pre-outs of the new amp. You
just have to use another male/male RCA extension to connect
your cable to the new amp. (Thanks Derek for the pictures)
7. Find a location for the amp, either at the back of the
rear seat (in the trunk) or like Anthony, relocate the stock
amp and the new one at the same location.
8. 12V to power the new amplifier (big gauge wires) should
be taken directly from the battery with a inline fuse as close
to the battery as you can. For the ground, don't try the rear
tail light bolts... This is a lousy ground and will give you
a lot of alternator noise (how do I know? Don't ask). One
of the rear seatbelt bolts will be perfect.
9. Now you just have to connect your subwoofer(s) to the amp.
If you use one sub only, make sure you have a bridgeable amp.
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| You can place the subwoofer where the ski bag
used to be, and if you don't have a ski bag, you can pop out
the metal plate that covers the opening and put some rubber
tubing around the edge (to keep from getting things caught,
cut, or ripped). Then push the box right up to the opening.
The armrest really needs to be down in order to get the bass
response. |
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