Mega Users paintpollz Posted March 8, 2013 Mega Users Share Posted March 8, 2013 This I'm sure has been covered elsewhere, I just couldn't find it. I have an aftermarket system, and I cheaped out on the wiring kit. Not SUPER cheap, but pretty cheap, and you get what you pay for:redface:. There is a 4 channel amp in the trunk, all speakers are re-wired from the doors. So about 5 months ago I repositioned my SAT antenna to the roof to see if I could get better sound quality (didn't do shit), and when I turned the car on after putting the HU back, I go an RPM dependent hissing noise. Doesn't matter if the radio is on or off. I cannot find where the interference is. All grounds are hooked up. Any suggestions? Drives me nuts when the radio is off. Thanks "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
iNVAR Posted March 10, 2013 Share Posted March 10, 2013 ground loop? Link to comment Share on other sites More sharing options...
Dbl_D718 Posted March 10, 2013 Share Posted March 10, 2013 Cheap wiring kits are just fine. Wire is wire (for the most part). What kind of head unit do you have? It's a ground loop, just gotta find the cause. Was this a problem before relocating the antenna? Did you touch any other wiring besides behind the head unit? MODS: PW TMIC, Cobb catted DP, HKS cat-back, AVO filter, Bren e-tune; Konis/Epics, Advan RCII Link to comment Share on other sites More sharing options...
Mega Users paintpollz Posted March 10, 2013 Author Mega Users Share Posted March 10, 2013 ground loop? Cheap wiring kits are just fine. Wire is wire (for the most part). What kind of head unit do you have? It's a ground loop, just gotta find the cause. Was this a problem before relocating the antenna? Did you touch any other wiring besides behind the head unit? It's inevitable that wires are going to be touched/moved when you pull the unit. I have a Kenwood DNX 7180, its a complete piece of shit IMO. "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
Dbl_D718 Posted March 10, 2013 Share Posted March 10, 2013 It's inevitable that wires are going to be touched/moved when you pull the unit. Well yeah. I meant more along the lines of doing extra stuff with your amps or speaker wiring, etc. Anyway, I'd pull the unit again and make sure nothing is loose to start with. While it's all apart, I'd try powering it up without the sat antenna hooked up to see if the wine goes away. MODS: PW TMIC, Cobb catted DP, HKS cat-back, AVO filter, Bren e-tune; Konis/Epics, Advan RCII Link to comment Share on other sites More sharing options...
I Donated Too sigmafour Posted March 11, 2013 I Donated Too Share Posted March 11, 2013 little miracle worker: http://www.stingerelectronics.com/productDetails.aspx?ProductId=112&CategoryID=3 cheap as chips. Link to comment Share on other sites More sharing options...
Mega Users paintpollz Posted March 11, 2013 Author Mega Users Share Posted March 11, 2013 Well yeah. I meant more along the lines of doing extra stuff with your amps or speaker wiring, etc. Anyway, I'd pull the unit again and make sure nothing is loose to start with. While it's all apart, I'd try powering it up without the sat antenna hooked up to see if the wine goes away. Update: Unplugged SAT and noise was still there...... "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
Mega Users paintpollz Posted March 11, 2013 Author Mega Users Share Posted March 11, 2013 little miracle worker: http://www.stingerelectronics.com/productDetails.aspx?ProductId=112&CategoryID=3 cheap as chips. Ya not bad so I'd need to just get two of those bad larrys and let them lay behind the dash? Jesus if I could fix this for $20?! They are like 10 bucks a piece at wally wal jesus all this after market ish in my car makes me slightly nervous that its going to go up in flames:lol: "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
I Donated Too sigmafour Posted March 11, 2013 I Donated Too Share Posted March 11, 2013 I got mine for under $6 each so yes, as many as you need! You could get one to use as diagnostics because if the noise is still there it's going to point to being generated on the power side to the amps themselves - Do you have a big cap on the 12v? Link to comment Share on other sites More sharing options...
Mega Users paintpollz Posted March 11, 2013 Author Mega Users Share Posted March 11, 2013 Do you have a big cap on the 12v? Big Cap? Like Capacitor? I think mine is 800w? I can't remember for sure..... "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
I Donated Too sigmafour Posted March 11, 2013 I Donated Too Share Posted March 11, 2013 0.8uf then? still should filter noise... is it okay? Link to comment Share on other sites More sharing options...
Mega Users paintpollz Posted March 11, 2013 Author Mega Users Share Posted March 11, 2013 0.8uf then? still should filter noise... is it okay? Huh, well maybe its the Cap? you think the Cap is going bad? "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
Dbl_D718 Posted March 11, 2013 Share Posted March 11, 2013 little miracle worker: http://www.stingerelectronics.com/productDetails.aspx?ProductId=112&CategoryID=3 cheap as chips. Bandaid. That might reduce the noise so it's not audible, but it doesn't fix the actual problem. Could potentially not work too. Capacitor on the power cable shouldn't have anything to do with it unless it's not grounded right. Not to mention...cap on the power cable isn't going to filter noise from the signal (or anywhere else from my experience). If there's noise without the sat antenna, you can start eliminating causes by unplugging stuff. Example: unplug the RCAs at the headunit and if there's still noise, you've eliminated the head unit as the cause. If the noise goes away, it's your head unit or something upstream of it. Unhook one amp at a time, one speaker at a time, whatever, to narrow down the possible causes. MODS: PW TMIC, Cobb catted DP, HKS cat-back, AVO filter, Bren e-tune; Konis/Epics, Advan RCII Link to comment Share on other sites More sharing options...
Mega Users paintpollz Posted March 11, 2013 Author Mega Users Share Posted March 11, 2013 When you unplug the RCAs the noise goes away. Wouldn't that mean that it elimates the HU? "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
Mega Users paintpollz Posted March 11, 2013 Author Mega Users Share Posted March 11, 2013 Oh wait. Now I see how it's the HU. Shit, I'm just in denial. So what would you record I do dbl? "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
Dbl_D718 Posted March 11, 2013 Share Posted March 11, 2013 No, because the noise goes away without the head unit, suggesting that the HU is what introduces the noise. How many pairs of RCAs do you have? You can try one at a time to see if it makes a difference, of if there's noise as soon as any RCA is connected. Is there noise in every speaker with just one RCA connected? Another bandaid that can help identify the problem is trying this: http://i268.photobucket.com/albums/jj11/Dbl_D718/WireWrapping.jpg If this fixes it, your headunit is damaged and needs repaired. MODS: PW TMIC, Cobb catted DP, HKS cat-back, AVO filter, Bren e-tune; Konis/Epics, Advan RCII Link to comment Share on other sites More sharing options...
Mega Users paintpollz Posted March 11, 2013 Author Mega Users Share Posted March 11, 2013 No, because the noise goes away without the head unit, suggesting that the HU is what introduces the noise. How many pairs of RCAs do you have? You can try one at a time to see if it makes a difference, of if there's noise as soon as any RCA is connected. Is there noise in every speaker with just one RCA connected? Another bandaid that can help identify the problem is trying this: http://i268.photobucket.com/albums/jj11/Dbl_D718/WireWrapping.jpg If this fixes it, your headunit is damaged and needs repaired. Ok. Thanks for the help. The HU is like a year old. There are a set of RCAs for the front and rear speakers. "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
Dbl_D718 Posted March 11, 2013 Share Posted March 11, 2013 Yeah I remember your install thread. Sometimes messing with RCAs without unplugging the battery first can damage the HU internally, though it's not very common unless you have a Pioneer. I damaged two Pioneers this way myself because I didn't learn my lesson the first time lol. Otherwise, make sure the HU is grounded well. MODS: PW TMIC, Cobb catted DP, HKS cat-back, AVO filter, Bren e-tune; Konis/Epics, Advan RCII Link to comment Share on other sites More sharing options...
Mega Users paintpollz Posted March 12, 2013 Author Mega Users Share Posted March 12, 2013 Yeah I remember your install thread. Sometimes messing with RCAs without unplugging the battery first can damage the HU internally, though it's not very common unless you have a Pioneer. I damaged two Pioneers this way myself because I didn't learn my lesson the first time lol. Otherwise, make sure the HU is grounded well. I'll go in and doublecheck the ground on the HU, but I'm not sure I grounded it anywhere than what the wiring harness had on it. What about those ground loop things. You said it's just a band-aid, but isn't that all I need? "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
iNVAR Posted March 12, 2013 Share Posted March 12, 2013 http://i268.photobucket.com/albums/jj11/Dbl_D718/WireWrapping.jpg If this fixes it, your headunit is damaged and needs repaired. that looks like a fire hazard. i know it isn't but still... Link to comment Share on other sites More sharing options...
Dbl_D718 Posted March 12, 2013 Share Posted March 12, 2013 I'll go in and doublecheck the ground on the HU, but I'm not sure I grounded it anywhere than what the wiring harness had on it. What about those ground loop things. You said it's just a band-aid, but isn't that all I need? Yeah typically the stock harness' ground is just fine unless it's come loose or something. Those are a bandaid in the sense that there will still be a ground loop. They don't fix the problem, they hide it, but yeah those could reduce the noise enough to not be a problem. I've personally never used them before though so I can't say how effective they are or aren't. that looks like a fire hazard. i know it isn't but still... Haha yeah it's a little ghetto, but all those exposed wires are doing is grounding the RCAs to the head unit's case. They're not hot. MODS: PW TMIC, Cobb catted DP, HKS cat-back, AVO filter, Bren e-tune; Konis/Epics, Advan RCII Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.