Ground Loop cannot be solved - PLEASE HELP
10-17-2011, 12:15 PM
#11
50 Watt CAFz'r
Join Date: Jun 2011
Posts: 117
Take a short piece of 18 wag wire, at the head unit touch the wire to the deck chassis and then touch to the outer part of the RCA while it's plugged into your deck, make not of the results, the take the same piece of wire and youth it to the negative terminal on your amp and touch the other end, while both deck and amp are on, to the outer part of the RCA at the amp and let me know what happens with the noise
10-17-2011, 02:34 PM
#12
Administrator
Join Date: Feb 2006
Posts: 16,855
...when I removed and inserted the RCAs while the amps and HU were running, I may have blown that fuse...
10-17-2011, 04:46 PM
#13
0 Watt CAFz'r
Thread Starter
Join Date: May 2010
Posts: 22
I've tried another source through different RCAs and the noise stops, so it's definitely the HU.
I'm just curious about one thing, and I hope someone can answer it.
Is it possible that the pico fuse inside my HU popped even though I can stop the noise when I turn my high beams on? If it's the fuse, servicing the HU or replacing it will be expensive and I REALLY want to avoid that route.
Take a short piece of 18 wag wire, at the head unit touch the wire to the deck chassis and then touch to the outer part of the RCA while it's plugged into your deck, make not of the results, the take the same piece of wire and youth it to the negative terminal on your amp and touch the other end, while both deck and amp are on, to the outer part of the RCA at the amp and let me know what happens with the noise
Yeah, I was never forewarned about this. You live and you learn.
Last edited by link2009; 10-17-2011 at 05:25 PM.
10-18-2011, 06:17 PM
#15
0 Watt CAFz'r
Thread Starter
Join Date: May 2010
Posts: 22
Well ladies and gentleman, that was the problem.
mommjomma, I did what you said and the noise completely stopped.
So I guess I burnt a trace or popped a fuse in the headunit, which is really an unfortunate situation. I will never play with live RCA cables again.
The question is, what do I do now?
How safe is this fix?
I don't want it to be a fire hazard. I also heard you can ground only one channel and it will be fine. Thoughts?
mommjomma, I did what you said and the noise completely stopped.
So I guess I burnt a trace or popped a fuse in the headunit, which is really an unfortunate situation. I will never play with live RCA cables again.
The question is, what do I do now?
How safe is this fix?
I don't want it to be a fire hazard. I also heard you can ground only one channel and it will be fine. Thoughts?
Last edited by link2009; 10-18-2011 at 06:27 PM.
10-18-2011, 08:26 PM
#16
10-18-2011, 08:39 PM
#17
Yes you can ground only one channel and be fine. The outer shield of the rca connector is in common with all the other outer shields of all the other rca connectors. This is a solution to the problem yes, the fix is a proper repair at the service depot.
10-18-2011, 08:50 PM
#18
0 Watt CAFz'r
Thread Starter
Join Date: May 2010
Posts: 22
I agree with you on the long term solution for how much will it cost? My service rep. said it would be cheaper for me to buy a new deck than to get it fixed.
I forgot to ask, is it okay if my battery is connected while I ground the RCAs to the HU?
