Ground Q/A sticky

blueeyedlion wrote: so I just measured the resistance between the battery and the HU GND, here are my findings: a) positive battery terminal disconnected, ignition off: 0.3ohms b) positive battery terminal connected, ignition off: 1.5ohms c) positive battery terminal connected, ignition on: 12+ohms d) positive battery terminal connected, ignition on engine started: 13+ohms reving the egnine dropped the resistance by a tenth or two. letting the engine idle eventually brought the resistance down to around 5+ohms. why does the resistance go up when the terminal is connected, or the ignition is on? does this behaviour explain alternator whine? the whine can only be heard when the engine is running, and would consistently fluctuate with the RPMs regardless of the resistance measured (between 5-13ohms). so do i have a GND loop? or is noise coming in at say my X-Over?

  well you cant really measure acurate resistance in a live circuit

I am running a Clarion VRX935VD head, a Lanzar Vibe430 amp, StreetWires rca, 4 to 8 power, head grounded to frame not factory ground and amp solidly ground on strut. Just recently pulled system out of another vehicle which never had “the buzz”. Head works great, no noise added the amp and at first no buzz but when I closed the trunk for the first time I got “the buzz”. I mounted the amp to the rear deck which I think is my problem but I am not one to advertise so I want to keep the amp hid. I have tried all possibly (wires and ground). When I disconnect the ground the amp still works. I guess my ultimate question would be, could it be the fact that it’s grounded to the deck, and if so what would be suggested for fixing the problem? I still would like to keep the amp mounted to the deck.

I have a serious sound issue on the entire left side of my 98' Ford Explorer...It has been this way ever since I got the car new and have taken it to Ford several times but they never can seem to find whats wrong with it.  I have recently installed 4 new pioneer interriors, thinking perhaps it was the factory speakers that was causing the problem.  After putting these in I notice the problem that much more.  The front left and rear left will be working, but be working very softly almost as if not working.  I turn the car on and everything is fine im driving along and I hit a small bump in the road and either the front left or the entire left side goes out.  To get them back up to speed I have to either hit another bump or turn the volume up above normal to get them back on.  I no longer want to push the limits of the speakers since they are new and I do not want to blow them.  I also plan on putting an amp and subs in the car, but do not feel like I should until I fix this problem.  HELP!!!!!

There is an issue with the hidden amplifier or the head unit. If it is the factory head unit, it is either internal in it. Replace the head unit with a similar one to verify. If it is the hidden amplifier, (hidden behind the passenger rear quarter panel, towards the rear seat), it as well will need to be replaced. If you are considering a new cd player, now is the time, as chances are it would solve all problems save for one. By replacing the cd player up front, it takes the factory one out of the equation, it also necessitates the bypassing of the factory amplifier in the rear (a simple process), thus two possible faulty birds are taken out with one stone. If the problem still arises, it may be a speaker wire intermittently going to ground on either the front or rear left side speaker. Top Secret, I can tell you but then my wife will kill me.

Still super busy as well guys, sorry for the spotty responses. 11:00 at night on a Sunday (day off) and another 7 hours to go on a job that must be finished. Yikes.Top Secret, I can tell you but then my wife will kill me.

Well I replaced the head unit around Christmas and the problem didn't change...I have a 4 channel amp I will install and hopefully that will work...

OK this is a weird one.. I have a Kenwood Cd/Mp3 sirus headunit.. Problem IDK i had an old kenwood deck.. which i just replaced because i thought it was bad.. so i go buy this new kenwood and. i hook it up.. i used crimp connectors on every wire.. grounded it to a nice clean spot. turn it on.. deck turns on but sounds like ground loop.. NO music is played.. i jiggle the cd player harness and it turns on.. and it worked. so i rechecked everywire. and then soldered each one.. goto work.. i get out of work and its doing the same thing sound like a ground loop.. i get mad hit center console and it starts working again.. im totally lost here.. the most recent thing i had done was a alarm installed.. a compustar 2wssR.. but it works great w/o problems.. can someone PLZ help me2WSS Compustar

1995 dodge avanger

Lowered On Tenzo r's And Kyb Agx's

Flowmaster 40's Exshaust

Viper Body kit.

Custom Paint..

17" chromes

Eclipse Console Swap

2 13kv.2 elemental Design subs

I currently have a StingerSPV44 battery installed in the spare tire well in the trunk of my car...I was wondering about grounding it...its currently grounded to the side of the well but I was thinking of updating that...to a bolt that passes thru the the well and connects to a cable that will connect to the frame so it will be grounded to the body and frame...is this a good idea or should I leave it the way it is?