I tried testing it by grounding the headunit to the ground wire for my subwoofer amp...but it didnt work. I'm hoping that doesn't mean I have a bigger problem.
Ahh, so you have an aftermarket sub and amp too? The plot thickens. The first thing I would do is, "un-ghetto" the wiring. Then I would look at the size, quality and condition of the amp power cable and signal wiring (speaker wires). Then I would make sure all the signal wiring is as far away as possible from the amp power cable. I've heard of instances where that can cause a problem. You may also have a ground loop problem. In that case, you might try a ground loop isolator like the one seen here (ES-034 ).
Its a start I guess.
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Black '99 GT , 3.73 gear, SpeedCal, K&N filter, Bullit wheels on Goodyear Eagle ZR 245/45, QA1 k-member, Granatelli front street coil overs, Steeda 555-8200R rear springs, Tokico struts, QA1 c&c plates, D&D Motorosports subframe connectors
Oh I think I might need one of those...things. But speaking of the plot thickening, this is bizarre. When I bought the car it didn't have this problem, then I had the subs installed and it started. I brought the car back to the audio place and they told me it was the amps. Later I had the car's a/c system tested and after I got it back from the shop the noise was gone, but it came back in a couple of days.
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1995 GT 5.0
CAI, American Thunder Cat-back, Mac O/R H-pipe, 180* thermostat, Steeda Tri-Ax shifter, Steeda rear swaybar, Urethane bushings, MSD coil, King Cobra clutch & flywheel, GT40 Intake Manifold, ~1800 watt sound system
Then I'm almost convinced you have a ground loop problem. Assuming your sub amp is wired in using the RCA connectors, here's what I'd do. Go to your hometown wal-mart and buy a Scosche ground loop isolator (GLI). I think they're around $12. Disconnect the RCA plugs from the sub amp and plug the GLI into the amp, then plug the RCAs into the GLI. Should take about one minute. If it doesnt fix the problem, take it back to walmart. But I would almost bet it will.
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Black '99 GT , 3.73 gear, SpeedCal, K&N filter, Bullit wheels on Goodyear Eagle ZR 245/45, QA1 k-member, Granatelli front street coil overs, Steeda 555-8200R rear springs, Tokico struts, QA1 c&c plates, D&D Motorosports subframe connectors
Ok now this is getting annoying. I tried the ground loop isolator, it didn't work. Also, I took the fuse out of the power cable to my sub amp to see if it was interference from that and it wasn't. Now I'm running out of solutions.
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1995 GT 5.0
CAI, American Thunder Cat-back, Mac O/R H-pipe, 180* thermostat, Steeda Tri-Ax shifter, Steeda rear swaybar, Urethane bushings, MSD coil, King Cobra clutch & flywheel, GT40 Intake Manifold, ~1800 watt sound system
Can you tell where they tapped into when they connected the sub amp? While the speakers are buzzing, disconnect the RCA plug or plugs going into the sub amp and see if that makes a difference.
Also, how did he wire the headunit in? Did he use the RCA jacks on the back of the unit?
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Black '99 GT , 3.73 gear, SpeedCal, K&N filter, Bullit wheels on Goodyear Eagle ZR 245/45, QA1 k-member, Granatelli front street coil overs, Steeda 555-8200R rear springs, Tokico struts, QA1 c&c plates, D&D Motorosports subframe connectors
The sub amp is connected through the rca jacks on the headunit. He bought an adapter and wired the mach speakers into the normal output. I already disconnected the sub amps and its power and it didn't do anything.
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1995 GT 5.0
CAI, American Thunder Cat-back, Mac O/R H-pipe, 180* thermostat, Steeda Tri-Ax shifter, Steeda rear swaybar, Urethane bushings, MSD coil, King Cobra clutch & flywheel, GT40 Intake Manifold, ~1800 watt sound system
So you basically disconnected the sub amp from the system? You took the fuse out thats good, disconnect the RCAs from the headunit, ok. Did you disconnect the sub amp ground? If you did that then the sub amp cant be the problem.
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Black '99 GT , 3.73 gear, SpeedCal, K&N filter, Bullit wheels on Goodyear Eagle ZR 245/45, QA1 k-member, Granatelli front street coil overs, Steeda 555-8200R rear springs, Tokico struts, QA1 c&c plates, D&D Motorosports subframe connectors
I have everything to the subs disconnected except the remote wire, so the power, ground, and input are gone...and the buzzing remains. I'm starting to think there's a problem with the car and not the audio system.
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1995 GT 5.0
CAI, American Thunder Cat-back, Mac O/R H-pipe, 180* thermostat, Steeda Tri-Ax shifter, Steeda rear swaybar, Urethane bushings, MSD coil, King Cobra clutch & flywheel, GT40 Intake Manifold, ~1800 watt sound system
Last edited by '95.0 stang; 06-22-2004 at 05:33 PM.
I agree. I don't know how big your sub amp is but if it's big enough, it could have damaged the alternator. You could disconnect the accessory belt for a few seconds (with the engine cold of course) and see if the problem goes away. Where is your amp power wire tapped in?
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Black '99 GT , 3.73 gear, SpeedCal, K&N filter, Bullit wheels on Goodyear Eagle ZR 245/45, QA1 k-member, Granatelli front street coil overs, Steeda 555-8200R rear springs, Tokico struts, QA1 c&c plates, D&D Motorosports subframe connectors
It's an 800 watt 2-channel amp and the power wire is run from the battery terminal. I'll check the alternator because someone else just told me they had a similar problem and it happened right before the alternator went out.
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1995 GT 5.0
CAI, American Thunder Cat-back, Mac O/R H-pipe, 180* thermostat, Steeda Tri-Ax shifter, Steeda rear swaybar, Urethane bushings, MSD coil, King Cobra clutch & flywheel, GT40 Intake Manifold, ~1800 watt sound system
The same thing pretty much happened to me with my old 1998 5.0. I replaced the 2 front speakers with Alpine speakers and within 2 days it blew my factory amp.
The same thing pretty much happened to me with my old 1998 5.0. I replaced the 2 front speakers with Alpine speakers and within 2 days it blew my factory amp.
How difficult was that engine swap?
Btw this thread is 5 years old.
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1995 GT 5.0
CAI, American Thunder Cat-back, Mac O/R H-pipe, 180* thermostat, Steeda Tri-Ax shifter, Steeda rear swaybar, Urethane bushings, MSD coil, King Cobra clutch & flywheel, GT40 Intake Manifold, ~1800 watt sound system
