Help! When self installs go wrong!

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=36041
Printed Date: July 05, 2025 at 2:44 AM

Topic: Help! When self installs go wrong!

Posted By: bored4long
Subject: Help! When self installs go wrong!
Date Posted: July 23, 2004 at 10:59 AM

YesterdayI installed a Pioneer 7600MP head unit along with a pair of speakers and an auxilary 12v outlet for my iPod.

Everything was working fine before I pieced my dash back together. After I put the hu in the dash, it no longer worked (The hu is DEAD).

I have no idea what I may have done to cause it to stop working.

Here is what I checked:
1. fuse on hu is good
2. radio fuse in fuse box is good
3. i have verified power is going to hu by using a voltmeter at the connector of the harness

What else can I check in order to identify the problem?? Any thoughts?

My only thought: the voltmeter would not read any voltage from the Acc wire when the key was on Acc. Isn't a signal supposed to be sent to the hu?

Another question: I hooked up my 12v outlet ground to the same screw that the radio ground uses. Will this add any noise to my system?

Please help me!
thanks!

Replies:

Posted By: DYohn
Date Posted: July 23, 2004 at 11:32 AM

Did you disconnect the battery before you wired the radio? If not, you have probably blown a fuse somewhere. Check them all. If the ACC lead is dead, the system will not power on (and this is another indication of a blown fuse in your car). Your 12v outlet ground will likely not create noticable noise in your system, although it is possible. A better question is where is it getting +12V power?

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Posted By: bored4long
Date Posted: July 23, 2004 at 12:12 PM

DYohn] wrote:

better question is where is it getting +12V power?

I'm not quite sure what your asking. The yellow wire is live at the harness (tested it with a multimeter with the black lead on the black wire of the harness)

Using the same method with my multimeter (positive lead to the RED / acc wire, and black to the ground wire) I get no voltage reading when I turn my car key to ACC nor when I turn it to the on position. So that seems like the likely suspect right now, but can anyone verify there is supposed to BE a voltage reading there, and of how much (12v?)

I'll go check every damn fuse I can find...see if ANY are blown right now.

thanks

Posted By: furflier
Date Posted: July 23, 2004 at 12:47 PM

[QUOTE=DYohn] If the ACC lead is dead, the system will not power on (and this is another indication of a blown fuse in your car).

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Posted By: mobile E
Date Posted: July 23, 2004 at 12:55 PM

I second Dyon on this one, ive done it before posted_image

.... You blew a random fuse that is stopping power to the HU. Check all the fuses you can

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everything stolen :(
Workin on a new system :)
posted_image

Peace in the middle east

Posted By: bored4long
Date Posted: July 23, 2004 at 1:12 PM

PROBLEM SOLVED....THANKS!

ok, checked all the fuses. all were good.

I noticed that the radio fuse in the fuse box had some wiggle room. I turned the key to ACC and played with the fuse (wiggling it around) and found that to be the problem. All I had to do was rig the fuse plug to limit wiggle and ensure a solid contact: problem solved.

thank you guys for your help. I'm embarrassed it was such a simple/obvious problem, but also very relieved.

Posted By: DYohn
Date Posted: July 23, 2004 at 2:07 PM

I'm glad you found your problem, but I doubt you have fixed it. Fuses should not wiggle. If it was not fully seated, OK, that's one thing and pushing it in fully is the fix. But if it is seated and it "wiggles," then you have a broken fuse holder and you should get it repaired. Just a word to the wise.

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