problems with audi
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=116778
Printed Date: May 11, 2025 at 12:07 AM
Topic: problems with audi
Posted By: markmorb
Subject: problems with audi
Date Posted: October 07, 2009 at 11:08 AM
Hi,
I have just tried to change the HU in my Audi A2 but have hit a problem.
I am trying to replace the Standard unit with a Pioneer 5100UB.
There does not appear to be any power reaching the HU when I turn the ignition on the unit is dead...when I unplug the ISO connector and plug it back into the factory HU then that works fine!!
I have tried the 5100UB in my partners car and as soon as I connected it to the ISO and switched the ignition on it burst into life.
I am very confused as the HU is obviously ok and the ISO connectors will power the factory HU just fine...
Any ideas? I'm stumped...
Thanks,
Mark
Replies:
Posted By: ceasar326
Date Posted: October 07, 2009 at 1:03 PM
Did you use the right harness for the car. Make sure you tied into the right wires. Also whats the brand and model of the harness?
Posted By: KarTuneMan
Date Posted: October 07, 2009 at 1:06 PM
Ask Howie !
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Posted By: markmorb
Date Posted: October 07, 2009 at 1:12 PM
Hi,
It's a 2004 Audi A2 1.4SE.
I'm using the following adaptors,etc..
Fascia Adaptor: Autoleads FP 05 04
ISO Harness: Autoleads PC9 404
Aerial Booster: Autoleads PC5 52
Thanks,
Mark
Posted By: yimke
Date Posted: October 07, 2009 at 4:24 PM
Even though this is hard to do, make sure your plugs are not mixed around. Otherwise you would be pulling your power from a speaker line.
Try switching around your RED / yellow wires. Do you have a multi-meter at all? If so test continuity of the black wire to a ground point in the vehicle.
Unplug the RCA connector for right now.
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