harness or deck?

**precision4** · 07-23-2005, 12:32 PM

Hey guys,

I'm new here (as you can see from my post count!) but I have a problem that I'm hoping that you could help with.
I have a Sony HU (CDx-M770) and I had JBL front speakers. The sound was distorted coming from the front right speaker so being the novice that I am I replaced the speakers with an Audiobahn component set (6.5). At first the sound was great but after about 1 hour the right speaker was distorted again, sounds like crackling coming from the tweeter mainly. It seems that if I move the harness around a bit I can make the speakers in the front completely cut out, sound perfect, or be in the crackling state. Is the deck dead? The shop that installed everything said that my deck is toast, but I'm not a very trusting person and they could just want me to purchase another deck. What can I do to test this out? The components are running off an amp but I know that the amp is good, and the previous speakers were not running off this amp. I hope this makes sense to you guys. Thanks in advance

**astral** · 07-23-2005, 02:55 PM

try running your own wires directly to the speaker. there might be a loose connection that starts to act funny after warming up. if this does not work you could always connect the lead from your front left speaker to the from right also, but you would lose stereo (just an idea if you don't want to spend the money for a new deck).

**2Fast** · 07-23-2005, 03:03 PM

Sounds like a loose connection or a short circuit between your HU and speakers.

**EsKALad** · 07-23-2005, 03:09 PM

i have a almost new pioneer deck with aux input for sale if you want!

**precision4** · 07-23-2005, 04:20 PM

thanks for the replies. the speakers were tested at the shop so i know that they are good. i just want to know if it can be a loose wire in the harness or if the output of the deck is messed up. what is the best an easiest way to test this?

Thanks for the deck offer but if my deck is shot I plan on purchasing an Eclipse CD8445!

**accentsound** · 07-23-2005, 05:35 PM

OK from the sound of it you have the HU connected to a Amp and then the amp connected to the speakers.

If that is the case where are you wiggling the harness? At the back of the head unit? At the amp? at the speaker sife of the amp?

Also how is the head unit connected to the amp? Via the speaker outs on the HU or RCA's?

One way to test this is to get hold of a walk man with a mini stereo jack to rca connector. Plug the walk man into the RCA inputs of the amps make sure if there is a switch to select between high and low level input that it is set to low level. If it sounds OK then there is a bad connection between the HU and the amp. Also if you are moving the harness at the back of the hu and you get changes then You can be pretty certain that you problem is in the harness and not the HU. Or there is a loose solder connection on the HU PCB where the speaker outs conect and that is a fairly easy thing to fix for someone that is good with a soldering iron.

**precision4** · 07-23-2005, 07:01 PM

Originally Posted by accentsound

OK from the sound of it you have the HU connected to a Amp and then the amp connected to the speakers.

If that is the case where are you wiggling the harness? At the back of the head unit? At the amp? at the speaker sife of the amp?

Also how is the head unit connected to the amp? Via the speaker outs on the HU or RCA's?

One way to test this is to get hold of a walk man with a mini stereo jack to rca connector. Plug the walk man into the RCA inputs of the amps make sure if there is a switch to select between high and low level input that it is set to low level. If it sounds OK then there is a bad connection between the HU and the amp. Also if you are moving the harness at the back of the hu and you get changes then You can be pretty certain that you problem is in the harness and not the HU. Or there is a loose solder connection on the HU PCB where the speaker outs conect and that is a fairly easy thing to fix for someone that is good with a soldering iron.

WOW. Thanks! the HU is connected to the amp through the RCA's and I am moving the harness at the HU. I dont have a walkman with a line in, is there another way to test this? Also, if I was to test this and the sound was fine that means that the deck is good correct? any idea which wire in the harness could cause this to occur if the RCA output is good? Would all the other wires be irrelevant to RCA's?
I hope it is just a simple harness problem
Thanks again.

**kevinlekiller** · 07-23-2005, 07:21 PM

Um not a walkman with line in.

Take the walkman(or mp3 player or portable cd player) Plug in a a 1/8'' stereo to double rca cable (the ones used to plug carputers and Head units together). Plug the rca ends in the amp, the 1/8'' in the walkman, turn the volume down completely on the walkman. Power the amp, turn up the volume of the walkman. Check if get the cracling noise that way.

Thats what he meant.

**precision4** · 07-23-2005, 07:38 PM

Originally Posted by kevinlekiller

Um not a walkman with line in.

Take the walkman(or mp3 player or portable cd player) Plug in a a 1/8'' stereo to double rca cable (the ones used to plug carputers and Head units together). Plug the rca ends in the amp, the 1/8'' in the walkman, turn the volume down completely on the walkman. Power the amp, turn up the volume of the walkman. Check if get the cracling noise that way.

Thats what he meant.

AHH! Thanks for the clarification. I will try that butI believe that the amp is good because the shop ran it on there test bench with the speakers and it was ok. I will try this myself and see though. Is there a way to tell if it is the harness with a bad connection or the deck with a bad output?