Amp Diagram, for 2003 MOST (non bose)

[Neb33]

Hi everyone,

I have a 2003 C4S, I bought a Ebay kit, but have a MOST system, but non bose. CAn anyone provide me with some instructions on how to do an amp bypass? I don't nkow where the amp is, and does anyone have a wiring diagram of the amp? How to feed the wires to the amp from the head unit?

thanks,

Ben

[Loren]

You likely have the Harman Amp (option M490).

click on image to enlarge

[Neb33]

Thanks Loren, any ideas where the amp is located? and how to fish wires from the dash to it?

[Neb33]

Just found the amp... looks like quite a job to fish the wires to the spare tire well.... any easier way to tap into the speaker wires without going to the trunk? I don't plan to replace the amp.

Also I have a Becker Amp Model BE 6600 Part # 996-645-331-01

Do you have that wiring diagram?

[Loren]

Just found the amp... looks like quite a job to fish the wires to the spare tire well.... any easier way to tap into the speaker wires without going to the trunk? I don't plan to replace the amp.

Also I have a Becker Amp Model BE 6600 Part # 996-645-331-01

Do you have that wiring diagram?

Please do a search here as a number of people have replaced speakers and amps.

I gave you the correct wiring diagram above.

[David Clarke]

If you have the big long connector for the speakers on your amp, you can use this connector/cable kit from your head unit to the front tire well, and connect to the harness. Check the wiring from Loren again it when it arrives, its easy to modify if you have to with a soldering iron and some heat shrink. This cable is wired wrong for the Bose amp, so is probably wired right for your amp (but really I am guessing). I have one here and its nicely made.

CDR23-amp-bypass-lead-ISO-PC2-95

http://www.ebay.com/...#ht_2802wt_1330

Edited July 9, 2012 by David Clarke

[Neb33]

Thanks DAvid, looks very interesting. The plug definitely looks like the one show on the ebay link. But the length of htis cable is only 1M. I don't think it's enough to get it into the spare wheel well from the inside dash. Also is there a DIY on how to feed the wires from inside the dash to the wheel well?

[Neb33]

Another question, I don't plan to replace the amp, and will try to power the stock speakers (non bose) with a double Din deck. Will that work?

[texanz71]

I just went through this same issue. I did end up fishing 8 wires from the head unit, through the rubber seal (upper driver side foot well), behind the battery to the passenger side, then drilled a small hole to get to the amplifier. I hard wired the head unit directly to the speakers with no amp in between and have been happy with the sound quality. I had to wire the front dash and door speakers as "front" and the rear speakers as "rear." I wanted to get the job done and this method worked fine for me. If I were to do it again, I would order a used amp from ebay that is compatible with the harnesses.

[David Clarke]

Thanks DAvid, looks very interesting. The plug definitely looks like the one show on the ebay link. But the length of htis cable is only 1M. I don't think it's enough to get it into the spare wheel well from the inside dash. Also is there a DIY on how to feed the wires from inside the dash to the wheel well?

The speaker wiring can be relocated up to closer to the battery and the 1m cable is plenty long enough.

[Neb33]

Thanks David, I end up just tapping into the harness in the trunk area. Worked out fine, everything is done and functioning.

[vncool]

Hello,

I am recently own a beautiful 2003 Porsche C4s and planning to replace with pioneer double din but ran into this same problem as everyone had related to MOST system.

 

Is there a step by step how To replace this system? your help would greatly appreciated.

 

[kbrandsma]

Yes there is a step by step guide.  PRESS HERE for one that was excellently done by Contributing Member rahlstrom and posted on this Board.

Edited June 16, 2014 by kbrandsma