relocated battery. Now getting whine though stereo

[tybanman]

I reloctated the batery to the rear of my ty. Just reinstalled the stereo. and it whines like a bitch! It did not do this before. the only thing that has been rewired is the bat.. I have had this problem with other vehicles, with the fix always being finding a better ground. It is well grounded. When I disconect the alt. wire the whine stops..... but this obviuosly causes a problem. Any ideas?

 

[KDBL1]

Re: relocated battery. Now getting whine though stereo

Any car audio store should have a noise filter or suppressor.I had the same problem a few years ago that cleared it right up. You could hear the alternator through the speakers.

 

[tybanman]

Re: relocated battery. Now getting whine though stereo

Shit! I just talked to a local stereo shop. Apparently in trying to keep things neat i caused a problem. The RCA's and power wires are running next to eachother. Oh well live and learn. Unfortunately I ran them under the center console.

 

[gjp]

Re: relocated battery. Now getting whine though stereo

I ran the power on one side and the rca on the other in my Sy.

 

[silverblaz]

Re: relocated battery. Now getting whine though stereo

could also be caused by a bad ground causing ground loop more common problem would be cheep RCAs with power right next to it

 

[Captain Morgan]

Re: relocated battery. Now getting whine though stereo

yeah, definately keep RCA's, Speaker and Power wires a minimum of 12" away from each other.

if that doesnt take care of the noise problem, go look in The Vault, i made a thread/diagram which shows how to bypass the stock power wires to the head unit so you can run a seperate ground and have the power tripped by a relay using the original power wire.

 

[Jer]

Re: relocated battery. Now getting whine though stereo

You have to run the rca wires and power wires away from each other.Also I have a one owner syclone for sale with 18K miles that is 100% stock and original down to the tires.Always garaged.Any interest call John @ 1-800-IM-BANNED .Perfect Truck!

WTF? Now our posts are being interrupted for commercials? :tdown:

All of these are fixes but the easiest one is to add a ground loop isolator. You can get one on eBay for less than $10 and it will simply plug in line between your RCA's and amp. Quick, easy and cheap.

 

[Tophatjimmy]

Re: relocated battery. Now getting whine though stereo

running your rcas and power wire down opposite sides is unnecessary. Maybe back in the early days of car audio you needed to do it, but with todays noise rejecting RCA's and higher voltage pre-out decks, you just don't have to do it. This is assuming you haven't used $3 Walmart RCA's of course.

I've been an installer for over 5 years now and in that time I have run the power, speaker wires and RCA's all together countless times. Guess how many times I've had alternator whine because of it? 0 times. NEVER.

Alternator whine is usually caused when you have a ground loop. Measure the resistance from your battery ground to your various grounds in the vehicle (amp, head unit, etc.) they should all be under .2 ohms or less. If you have one that is higher than the others it's bad and is likely causing the noise.

In my experience, 90% of all engine whine is caused by a bad ground. A ground loop isolator should be a last ditch band-aid if all else fails.

Also, just an afterthought, but what condition is your battery and it's connectors/cables in? If you have a dying battery, it cannot effectively filter out the AC ripple from your alternator and will cause noise. If you have a loose or corroded connector you will get a high electrical resistance and it will cause noise.

Good luck.

 

[Tophatjimmy]

Re: relocated battery. Now getting whine though stereo

Also, what kind of deck are you using? The newer Pioneer head units have a micro fuse inside of them that are VERY easy to blow. Any power surge will pop them, even plugging in RCA's while the deck is on will cause them to go. Once that fuse pops you'll have noise forever unless you want to shell out the $$ to have the deck opened up and that fuse replaced.

Just food for thought.