Head Unit Has Power , But No Sound! - BMW Forum

bimmer_boy · 12-30-2004, 08:25 PM

I just installed a Alpine 9831 into my bmw 325i and it powers up perfect, but puts out no sound at all!

I have the wiring harness and antenna adapter installed, everything seems to be hooked up fine.

I'm confused. Anyone have any clue of what I'm doing wrong?

The only unused wire on the harness is the light blue one...

jllphan · 12-30-2004, 08:31 PM

And there's your problem. You have to make sure your remote wire is connected to the amp turn on lead. Run your power antenna lead and your amp turn on lead together. SHould be fine after that.

bimmer_boy · 12-30-2004, 09:13 PM

What does the amp lead look like? The only other wires not hooked up coming from the Alpine harness are a light blue and blue with black stripe. I think those are speaker wires. Also, one pink wire. The pink wire, eh?

jllphan · 12-30-2004, 09:33 PM

You kids don't read manuals do you :P

The harness crutchfield gave you should have a lead labeled "amp turn on" or something to that effect. that wire should be connected to both the power antenae wire and the amp turn on/remote wire on the Alpine harness. You just need to make sure that those two wires ultimately are linked to the amp turn on lead in the BMW harness (#16 on the below diagram {top left})....

jllphan · 12-30-2004, 09:35 PM

so to sum up....

pwr ant. wire and remote turn on------>amp turn on----->pin hole #16

(on the Alpine harness) (crutchfield harness) (harness plug in car)

bimmer_boy · 12-30-2004, 10:18 PM

Haha! Thanks a lot man. It's all working wonderfully now. Now I just have to learn all the features! lol ...

jllphan · 12-31-2004, 01:56 AM

YoungExec728 · 01-04-2005, 01:42 PM

haha!! this tread gave me a good laugh.

Yes you need to turn on the amp to get sound. Much sarcasim intended

bitchincamaro · 01-09-2005, 07:10 PM

I just got an Alpine 9835, and when i wired it up, i had sound for the tuner function, but not for cd or my ipod input....would this be the same problem? I wouldn't think so because i had sound for the radio.

I sent the thing back to the guy i bought it from and am getting another... was it really ok? I messed around with that thing forever.

mattster2002 · 01-09-2005, 10:05 PM

Yes. Make sure you hooked up the damn amp turn on cable (remote). Then your set!!!!

bitchincamaro · 01-09-2005, 10:49 PM

Quote:

Originally posted by mattster2002@Jan 9 2005, 10:05 PM
Yes. Make sure you hooked up the damn amp turn on cable (remote). Then your set!!!!

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why would the radio work and not the cd and aux functions? I could listen to the radio, but the other functions did not output sound.

jllphan · 01-09-2005, 11:03 PM

Because you were using the power antenna lead, not the remote lead for the factory amp. Two different voltage outputs. Oh well, when you get it back, just twist the remote wire and the antenna lead from the deck's harness and you'll be all set

bitchincamaro · 01-10-2005, 09:14 PM

Quote:

Originally posted by jllphan@Jan 9 2005, 11:03 PM
Because you were using the power antenna lead, not the remote lead for the factory amp. Two different voltage outputs. Oh well, when you get it back, just twist the remote wire and the antenna lead from the deck's harness and you'll be all set

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damn i feel like an ass. I always think i know everything, being a DIY guy. oh well! ha! You are the reason these forums are so great. Thanks man.