the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

Ground Q/A sticky


Post ReplyPost New Topic
< Prev Topic Next Topic >
Alpine Guy 
Platinum - Posts: 2,478
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: October 18, 2003
Location: Canada
Posted: November 02, 2004 at 10:15 PM / IP Logged  

I don't know if anyone added this yet, , i don't have time to read all the posts.  But iv kinda done some ground testing.

What i have noticed on 75% or more occasions is that when an amplifier is grounded just enough for it to work, , but still not properly, , you will get constant static shocks when exiting your vehicle.

You get this when you don't scrape away paint, but the ground is just enough from the screw itself , or when its rusted.

So if your getting zapped often, ,time to clean your grounds.

2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
gAmAX2K1gle 
Member - Posts: 3
Member spacespace
Joined: November 03, 2004
Location: Georgia
Posted: November 03, 2004 at 1:11 PM / IP Logged  

First off-

I've been reading on the board for a couple of months doing research on my car alarm install and have found a lot of great information. I just haven't had a solid free weekend to do the install (Clifford Matrix RS2 - bought over a year and a half ago - just getting around to installing it, lol). I've searched regarding this problem but haven't found anything that exactly matches my issue.

My problem:

I have a 2001 Maxima GLE (viewable on my homepage). I recently bought a 20G iPod for it. I also bought the dock and installed it in the ashtray and ran a cable (line out to male RCA) from it to an FM Modulator. The FM Modulator sucked since it got static and the .mp3 sounded like crap.

To fix this, I bought the Soundgate AUXNISS ( http://www.discountcarstereo.com/detail.aspx?ID=610 ) that plugs into the back of my Bose HU. The cable from the iPod dock plugs into the Soundgate box and the .mp3 now sound like I was playing a CD. At the same time, I installed the PAC AOEM-NIS2 so I could add an additional amp and sub in the trunk. That works fine and the sub sounds awesome.

However, I have a horrible alternator whine/engine noise ONLY when playing the iPod.  This is only when the engine is running. The Soundgate box does not have any grounding wires nor does the iPod/dock. Is there a way to ground either? The Soundgate box is powered via the Alpine amp in the trunk. Should I try to power the Soundgate box a different way? The amp seems to be grounded ok, though I may move it to a different location. I've had quite a bit of discuss on my Maxima board but we aren't installers and can't think of the reason. One guy suggestion ground loop isolators, but from I've read on here, those only seem to band-aid a problem rather than isolating and fixing it.

Any help/info would be greatly appriciated.

Thanks,

Eric
www.maxima.org/forums
"GaMax97GLE"

goldrodeo 
Member - Posts: 7
Member spacespace
Joined: June 02, 2004
Location: United States
Posted: November 11, 2004 at 5:21 AM / IP Logged  

Eric,

It appears that the Soundgate AUXNISS http://www.discountcarstereo.com/detail.aspx?ID=610  has a ground and a 12V+ wire.
1. Leave everything as is and power the iPod from it's own power supply --note the results
2. If you hear no noise after the above, then try powering the iPod from a different location in the car
3. if #1 fails, then try grounding the AUXNISS to another location (Soundgate does not recommend grounding this unit to the ground wire on the radio harness).
Good luck

Quiet!

Quiet!
A stupid question is the one you never ask.
gAmAX2K1gle 
Member - Posts: 3
Member spacespace
Joined: November 03, 2004
Location: Georgia
Posted: November 11, 2004 at 2:17 PM / IP Logged  
goldrodeo wrote:

Eric,

It appears that the Soundgate AUXNISS http://www.discountcarstereo.com/detail.aspx?ID=610  has a ground and a 12V+ wire.
1. Leave everything as is and power the iPod from it's own power supply --note the results
2. If you hear no noise after the above, then try powering the iPod from a different location in the car
3. if #1 fails, then try grounding the AUXNISS to another location (Soundgate does not recommend grounding this unit to the ground wire on the radio harness).
Good luck

There is one red and one yellow wire from the AUXNISS that (per the supplied instrustions) are supposed to be connected to +12V, which I thought was odd. So one of these wires should be a ground wire? The only other wires from the AUXNISS are part of a harness that plugs into the changer port on the back of the head unit. I'll look over everything again.

Thanks.

gAmAX2K1gle 
Member - Posts: 3
Member spacespace
Joined: November 03, 2004
Location: Georgia
Posted: November 12, 2004 at 3:19 PM / IP Logged  
gAmAX2K1gle wrote:
goldrodeo wrote:

Eric,

It appears that the Soundgate AUXNISS http://www.discountcarstereo.com/detail.aspx?ID=610  has a ground and a 12V+ wire.
1. Leave everything as is and power the iPod from it's own power supply --note the results
2. If you hear no noise after the above, then try powering the iPod from a different location in the car
3. if #1 fails, then try grounding the AUXNISS to another location (Soundgate does not recommend grounding this unit to the ground wire on the radio harness).
Good luck

There is one red and one yellow wire from the AUXNISS that (per the supplied instrustions) are supposed to be connected to +12V, which I thought was odd. So one of these wires should be a ground wire? The only other wires from the AUXNISS are part of a harness that plugs into the changer port on the back of the head unit. I'll look over everything again.

Thanks.

Well, I just got an email back from tech support @ Soundgate and both the yellow and red wires are power wires. One is constant power, one is switched on power. The gound is in the 12-pin harness that goes to the HU, so they share a common ground.

Anyone know how to isolate the ground wire in the 12-pin changer harness? (2001 Nissan Maxima GLE w/ Bose)

uthinkuknoaudio 
Silver - Posts: 760
Silver spacespace
Joined: October 08, 2004
Location: United States
Posted: November 14, 2004 at 7:51 PM / IP Logged  

Rule of thumb : Keep grounds less than or equal to 3 feet. No need to say more !

"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.
forbidden 
Platinum - Posts: 5,352
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: November 01, 2003
Location: Alberta, Canada
Posted: November 14, 2004 at 7:57 PM / IP Logged  
Actually that is not entirely accurate. It is the assumed correct way of doing things but leaves much of the equation left blank. I'll post up on this at a later date.
Top Secret, I can tell you but then my wife will kill me.
uthinkuknoaudio 
Silver - Posts: 760
Silver spacespace
Joined: October 08, 2004
Location: United States
Posted: November 14, 2004 at 8:00 PM / IP Logged  

My momma always said that there was exceptions to every rule - lol

"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.
forbidden 
Platinum - Posts: 5,352
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: November 01, 2003
Location: Alberta, Canada
Posted: November 14, 2004 at 8:14 PM / IP Logged  

In this case it is called resistance on the ground return. It equates to this. You eat a sub and then someone sews your buttcheeks shut, get the drift? Electricity is an algebra equation, what you do to one side you must do to the other. It is not about the size of the metal used in the chassis of the vehicle, it still must be connected to the ground of the battery. It is about the resistance through the chassis, it's crappy weld joints, glued together unibody panels, tack welded seatbelt bolts (and similar) that all add up to a high ground return resistance.

The proper way to ground a system is to ensure that the ground return resistance is as low as possible, best to be below 1/2 ohm. If the return cannot be made to co-operate by means of threats, thrown tools or all adequate and proper grounding procedures (known as the BIG 3), then it is best to run the ground direct to the battery.

Top Secret, I can tell you but then my wife will kill me.
davidwh2 
Member - Posts: 10
Member spacespace
Joined: November 23, 2004
Location: United States
Posted: November 23, 2004 at 7:39 PM / IP Logged  

hey whats going on.   i just installed a Cd player and amp in my truck.  ive had everything hooked up for a week.  there wasnt the first problem.  tonight on the way home my amp stopped working.  i checked the fuse, it was fine, even put a new one in.  i checked all the cables, nothing is lose or disconnected, i even pulled my cd played to make sure the blue remote wire wasnt disconnected. 

after all this i noticed that when i start my truck, the amp turns on for a second then turns back off, i checked the ground and when i touch it to the ground it comes on but goes back off, so im not sure what it could be. a side note:  the amp wasnt hot, no wire terminals werent burned or melted. soo i dont know.  any help will be appreciated.

-dwh2-
Page of 24

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Tuesday, January 26, 2021 • Copyright © 1999-2021 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer