still getting engine squeel through speakers..help please!

[ninobrn99 10+ year member]

I have a Pioneer 700bt rcas running to a cadence zrs 9004 for my fronts and rcas running to my PG xenon 600.1 for my subs. I have grounded the RCAs to HU as mentioned in one of the stickies. I have run both grounds for each amp to the same place. My rears are ran off of the HU and no squeel is coming from them, only the fronts (that are ran off an amp) I noticed that when the rear of the vehicle hits a speedbump it starts doing it if it wasnt already or vice versa. Any ideas on what else I could check?

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[FurbiesAndBeans 10+ year member]

Check to see if it's your HU or your amp. To do this, just unplug the RCAs, then plug in an ipod or something to your amp. If it still does it, then it's your amp ground that's bad. If it doesn't, there are other possibilities.

If you are running your RCAs with your power cables, try running a pair of RCA straight from your HU to your amps so that the power wires are not close to them.

Try grounding your HU chassis, and finding a good ground for your stereo.

 

[Ridley 10+ year member]

Check your amp ground. Make sure it is tight and on a clean area on your frame...

I just had this problem today and fixed it just by moving my grounding elsewhere.

 

[DJ Nitrous 427 10+ year member]

Im willing to bet its the pico fuse bullsh!t in the Pioneer radio....get a short piece of wire...skin back on both ends...hook one end in the side of the RCA and plug it in..then ground the other end on the cage or whatever....that should fix it

Edit: Reading full post > me

Humm...iono

 

[TurdFergueson2 5,000+ posts]

Check your amp ground. Make sure it is tight and on a clean area on your frame...
I just had this problem today and fixed it just by moving my grounding elsewhere.

Look at Ridley learning the tricks of the trade..........lol.

 

[ninobrn99 10+ year member]

Guys, I checked the amp ground and I even moved it to the same place that my other amp is grounded to. I also unplugged the original RCAs that were going to my amp for my fronts and connected my rcas that were going to my sub amp. Same issue.

I unplugged the RCAs from the amp, but kept them connected to the HU. No squeel. As soon as I touched the RCAs to the amp input the squeel started up again. Does that make sense? The power and remote for the amp were on. If it were a ground loop in the amp, then I should've heard it coming through the speakers even though there was no input from the HU other than the remote?

 

[Ridley 10+ year member]

If you can't figure out how to get rid of it, this should help.

http://cgi.ebay.com/PAC-SNI-1-SNI1-Ground-Loop-Isolator-RCA-Noise-Filter_W0QQitemZ190239098844QQihZ009QQcategoryZ50552QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[trashedxj 10+ year member]

most of the time its one of these 2 things, deff check your ground, sand that bish down to bare metal, hook your ground to it and put a lil grease on the area to prevent rusting, if thats not it sometimes if your power wiring to your amp is ran beside or within a inch or so of your RCA's sometimes it will "catch signal" from your power wire and play that small squeal which is usually the whine from your alternator. i ran my power and rca's on opp sides of my vehicle and the whine was all gone. hope some of this helped.

 

[ninobrn99 10+ year member]

I pulled the RCA cables and noticed that they had red stains on them. It ran all the way through to the wires. Its too dark out to reroute everything, so Ill do it in the morning. Im going to run them on the opposite side of my jeep.

I took the HU in to have it checked out and they said that it was fine. I checked my grounds in the engine bay and they all seem to be nice and tight.