# alpine h/u install on audi help!? **URL:** \ **Category:** PittSpeed Automotive\ **Created:** [June 19, 2007, 2:37pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641 "2007-06-19T14:37:12Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [June 19, 2007, 2:37pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/1 "2007-06-19T14:37:12Z")
Anyone good with wiring up a head unit? I just got my new head unit last night (along with new speakers) and I’m having trouble getting it to work properly. Here’s where I stand at the moment: once everything is plugged in, the head unit will turn on, scan for stations, turn on/off (without the key in), but no music will come out of the speakers. Only at the highest volume level of the head unit will anything come from the speakers. Even then, you have to listen very very hard to hear anything. This makes me think there is no power going to the speakers. Here is the cluster f\*ck wiring harness I’m using: ![http://i67.photobucket.com/albums/h302/thenewedgeco/IMG_0034.jpg](http://i67.photobucket.com/albums/h302/thenewedgeco/IMG_0034.jpg) I’m not used to having to use a relay so I’m getting thrown off. Everything that is in the original wiring harness of the car has a place to plug into except for the single little brown “harness” pictured here (3rd plug): ![http://i67.photobucket.com/albums/h302/thenewedgeco/IMG_0029.jpg](http://i67.photobucket.com/albums/h302/thenewedgeco/IMG_0029.jpg) I honestly have no idea what that is for. It appears to be a ground wire that connected to the original stereo? If anyone has a clue as to what I’m doing wrong I would love to know. Thanks! ---
**Author:** ![berad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/berad/32/5953_2.png) [@berad](https://forums.speedlife.net/u/berad)\ **Post date:** [June 19, 2007, 4:36pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/2 "2007-06-19T16:36:03Z")
Investigate ‘speed harnesses’ available at Circuit City Road Shops. For about $30 they sell ‘A’ and ‘B’ sides to a harness that makes it so easy, no cutting, just plug and play. Tell them the head unit you have and the year/model of your Audi. ---
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [June 19, 2007, 5:04pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/3 "2007-06-19T17:04:23Z")
> [@SICKEST RAPPER IN TONAWANDA MAKES AN UNOFFICIAL APPREARANCE AT MIGHTY](https://forums.speedlife.net/t/sickest-rapper-in-tonawanda-makes-an-unofficial-apprearance-at-mighty/30861/18): > > Investigate ‘speed harnesses’ available at Circuit City Road Shops. For about $30 they sell ‘A’ and ‘B’ sides to a harness that makes it so easy, no cutting, just plug and play. Tell them the head unit you have and the year/model of your Audi. I know that I have everything that I need so I would rather not spend the extra money. It’s a good last option, until then, it’s a puzzle that I need to solve. ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\ **Post date:** [June 19, 2007, 7:42pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/4 "2007-06-19T19:42:22Z")
does it maybe have a factory amp thats not geting powered on? ---
**Author:** ![bgblockelcamino](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bgblockelcamino/32/5997_2.png) [@bgblockelcamino](https://forums.speedlife.net/u/bgblockelcamino)\ **Post date:** [June 19, 2007, 9:29pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/5 "2007-06-19T21:29:00Z")
so yourself a favor and lose the Audi 😃 ---
**Author:** ![slowcamaro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/slowcamaro/32/5975_2.png) [@slowcamaro](https://forums.speedlife.net/u/slowcamaro)\ **Post date:** [June 19, 2007, 9:37pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/6 "2007-06-19T21:37:05Z")
talk to first bass he said audi’s are a pain in the ass…some have amps some don’t…there are different harnesses… this might be a job for a stereo installer. not worth the agrevation when its cheap to get it installed ---
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [June 20, 2007, 6:46am UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/7 "2007-06-20T06:46:58Z")
> [@Me fail engrish? thats umpossible](https://forums.speedlife.net/t/me-fail-engrish-thats-umpossible/30873/6): > > does it maybe have a factory amp thats not geting powered on? that’s what i’m guessing. it seems like everyone i talk to has a different story for what to do. no one can give me a straight answer on the factory amp. to me, this is what it seems like. the only problem is, i haven’t a clue which wire is the remote turn-on for the amp. > [@FS: 96 Impreza L B.O](https://forums.speedlife.net/t/fs-96-impreza-l-b-o/30868/10): > > talk to first bass > > he said audi’s are a pain in the ass…some have amps some don’t…there are different harnesses… > > this might be a job for a stereo installer. not worth the agrevation when its cheap to get it installed so i’ve quickly found out that they are a huge pain in the ass. as i said above, everyone has a different answer. i messed with it all last night and still nothing. if this keeps up, looks like i may be going to visit chaz one of these days. ---
**Author:** ![4doors5gears](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/4doors5gears/32/6006_2.png) [@4doors5gears](https://forums.speedlife.net/u/4doors5gears)\ **Post date:** [June 20, 2007, 7:05am UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/8 "2007-06-20T07:05:12Z")
Maybe the brown plug is the remote turn on. Did you check any Audi forums? [Crutchfield.com](http://Crutchfield.com) might have some different harnesses you can look at to compare. What kinda speaker system is in the car? Shouldn’t be that hard to figure out, just gotta dig up some more information. ---
**Author:** ![Heart4Audio](https://avatars.discourse-cdn.com/v4/letter/h/d9b06d/32.png) [@Heart4Audio](https://forums.speedlife.net/u/Heart4Audio)\ **Post date:** [June 20, 2007, 6:50pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/9 "2007-06-20T18:50:30Z")
i install car audio products daily and have no clue what the hell you’re using that relay for. haven’t seen that one yet. the blue with white stripe is your remote turn on from the radio. yes you have a factory amp. get me a year make and model and i’ll try my very best for some wiring diagrams for you. and if you could clarify the wire colors you have in that audi harness it would be nice too. ---
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [June 21, 2007, 7:03am UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/10 "2007-06-21T07:03:42Z")
> [@peeps with @adelphia.net email addresses.](https://forums.speedlife.net/t/peeps-with-adelphia-net-email-addresses/30834/15): > > Maybe the brown plug is the remote turn on. Did you check any Audi forums? [Crutchfield.com](http://Crutchfield.com) might have some different harnesses you can look at to compare. What kinda speaker system is in the car? Shouldn’t be that hard to figure out, just gotta dig up some more information. I have tried connecting the remote turn-on to that brown wire and it was a no go. Yes, I have searched every Audi forum I can find and every one seems to have a different answer. I got everything from Crutchfield and this is the harness they provided me. The stock speakers? I actually ordered some Polk’s to replace all the stock speakers but I would like to get the HU working before I move on to that stuff. > [@WTH: May need some side-help (nights) week of 18-22...](https://forums.speedlife.net/t/wth-may-need-some-side-help-nights-week-of-18-22/30856/25): > > i install car audio products daily and have no clue what the hell you’re using that relay for. haven’t seen that one yet. the blue with white stripe is your remote turn on from the radio. yes you have a factory amp. get me a year make and model and i’ll try my very best for some wiring diagrams for you. and if you could clarify the wire colors you have in that audi harness it would be nice too. check your PM’s ---
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [June 28, 2007, 12:37pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/11 "2007-06-28T12:37:07Z")
All four speakers installed along with the HU. Front two speakers work just fine so obviously the HU works as well. However, the rear speakers still aren’t playing any tunes. I attempted to use a “harness” that I made to connect the rears to the stock speaker wiring. The problem is, I still have no idea how to hook up the (-)'s from the speakers as the Audi uses a common grounding system. I have attempted to connect them to their matching (FR to RR, FL to RL) but that only made the front speakers crackle. I attempted to hook the (-)'s up to the grounding wire and this caused all speakers to shut off. Any other ideas aside from running new wires? ---
**Author:** ![fmfkid250](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fmfkid250/32/5973_2.png) [@fmfkid250](https://forums.speedlife.net/u/fmfkid250)\ **Post date:** [June 29, 2007, 5:25pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/12 "2007-06-29T17:25:45Z")
audi what? I’m the man with this shit… just all me the “The Intergrator” ---
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [June 30, 2007, 11:24am UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/13 "2007-06-30T11:24:39Z")
> [@Official Duffs Meet Thread (monday's)](https://forums.speedlife.net/t/official-duffs-meet-thread-mondays/31050/27): > > audi what? > > I’m the man with this shit… > just all me the “The Intergrator” 1995 Audi 90 Any help that you can provide would be huge. Right now I’m rockin’ the front two speakers but would much appreciate the back ones to work properly as well. ---
**Author:** ![berad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/berad/32/5953_2.png) [@berad](https://forums.speedlife.net/u/berad)\ **Post date:** [July 17, 2007, 9:00am UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/14 "2007-07-17T09:00:27Z")
Any luck? ---
**Author:** ![fmfkid250](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fmfkid250/32/5973_2.png) [@fmfkid250](https://forums.speedlife.net/u/fmfkid250)\ **Post date:** [July 17, 2007, 9:15am UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/15 "2007-07-17T09:15:03Z")
Behind the factory radio is a VW harness with a black, brown, and red plug. The red plug is for the amplified rear speakers. The black plug is standard power, ground, illumination, and the white wire is amplifier and antenna turn on. The red plug has the rear speaker wires in it. right rear (+): red/green right rear (-): brown/black left rear (+): blue/green left rear (-): blue/red The brown plug has the front speakers and can be hooked up with the regular VW harness. That should power up your rear speakers GOOD LUCK ---
**Author:** ![berad](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/berad/32/5953_2.png) [@berad](https://forums.speedlife.net/u/berad)\ **Post date:** [July 17, 2007, 9:51am UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/16 "2007-07-17T09:51:46Z")
Why are you using relays for head unit btw? lol Also wonder why the red plug is cut behind the harness…? Someone was being ultra custom on your car. ---
**Author:** ![tegSimple](https://avatars.discourse-cdn.com/v4/letter/t/d6d6ee/32.png) [@tegSimple](https://forums.speedlife.net/u/tegSimple)\ **Post date:** [July 17, 2007, 2:01pm UTC](https://forums.speedlife.net/t/alpine-h-u-install-on-audi-help/190641/17 "2007-07-17T14:01:04Z")
> [@Tire shaving on newman's 240... 10 dollars per tire. VID](https://forums.speedlife.net/t/tire-shaving-on-newmans-240-10-dollars-per-tire-vid/31378/7): > > Any luck? yup…i ripped apart the door panel and started messing around with the multimeter that i had. then i took a spare speaker and just started touching wires to each contact. turns out i had the wire leads in the doors in the wrong place in the harness. the wiring harness that goes to the speaker is actually two pieces, one for the built in amp and the other for the speaker. i guess i had them originally plugged into the wrong one! > [@Bought me a lawn tractor](https://forums.speedlife.net/t/bought-me-a-lawn-tractor/31382/2): > > Why are you using relays for head unit btw? lol > > Also wonder why the red plug is cut behind the harness…? Someone was being ultra custom on your car. i was attempting to use a relay because crutchfield said i needed it. yeh…they were wrong. fmfkid…thanks for the help. no one had a diagram to help me out so i just went with the good old trial and error method. i have no idea why those wires were cut behind the harness. the guy i bought the car from said the original owner had done that which i find hard to believe. it looks like someone got 2 out of the 3 harnesses needed and just spliced into the extra wiring harness.