Aftermarket headunit No Sound - Help!

[PROW355]

Hey blackhat, I have had this happen before when replacing the OEM business CD Player head unit with my Pioneer AVH5900. IMO, check the aftermarket wiring harness connection for being loose and/or wiring for correct splicing to OEM wires. There is plenty of information about this kind of problem on the site, search and sift. Also, you may need to plug your oem HU back in, turn the volume to a comfortable level, swap it back out for the new HU and see if it makes a difference.

[blackhat840]

I have done lots of searching and sifting but all I ever find especially related to the DSP head units is that it can not be done not to even try it. Now this one person gives me a little hope and I can't get them to reply back to PMs or here lol on how they actually used the line outs and where.

[PROW355]

well if your head unit is older than the car you drive, you might need to get a newer head unit. Preferably with line outs built in. If your head unit doesnt work with the IBUS, than the only way around it is by adding an amplifier and wiring all your speakers (probably 10 of em) and head unit to the capable amp.

[blackhat840]

I think I was misunderstanding. The headunit I have is brand new and has 3 lineouts built in. However I was wondering what he used between the line outs and where he is connecting to. Is he splicing into the regular wires, using a wiring harness for aftermarket and using PAC line outs going from the aftermarket headunit line outs to the factory speaker wires. That is what I am trying to figure out what the guy did with leaving the control unit in the car and just using the line outs on his new headunit.

[fmugur]

Originally Posted by blackhat840

I think I was misunderstanding. The headunit I have is brand new and has 3 lineouts built in. However I was wondering what he used between the line outs and where he is connecting to. Is he splicing into the regular wires, using a wiring harness for aftermarket and using PAC line outs going from the aftermarket headunit line outs to the factory speaker wires. That is what I am trying to figure out what the guy did with leaving the control unit in the car and just using the line outs on his new headunit.

How defective is you radio? As everyone here said you need the handshaking on the iBus for the DSP to stay on. If your radio is good enough for that you can do a similar install as I did for the Hualingan in this thread: http://www.xoutpost.com/bmw-sav-foru...9-e53-diy.html

[blackhat840]

It actually works witht he business cd player installed and the control unit. Its just a little broken. I can only power the unit on using the volume dial and control the volume through the unit. I have to actually use the steering controls to change stations, tracks etc.

[blackhat840]

Fmugur, the Piece that you put in the back was that the tuner from under neath the spare tire or was that the control unit below the cd player up front?

[fmugur]

The radio/CD goes in the trunk and the MID (you call it control unit) in the glovebox. What tuner underneath the spare? Did you have oem nav?

[blackhat840]

No I don't have an oem nav. Someone told me there is a tuner under spare tire. I may be wrong. I have not looked. So let me get this right the whole radio up front including the business cdplayer and the headunit piece on the bottom must be placed in the back, or just one of them. I'm trying to get all of this information for friend, he puts in radios but never has done one on a BMW. All of your help is appreciated. If you want to exchange phone numbers i'm cool with that too.

I know I'm probably a little dumb when it comes to this or maybe a little confused. Also i don't have the round pin connectors I have the new style.

[blackhat840]

What exactly are you doing with the DB25 connector in the back. Directions are not entirely clear.