We just had a new head unit installed last weekend and it seems to be picking up interferance from anything else electrical in car and engine . It never happened before with our old head unit. Took it back today and they ran an extra eath which helped a bit. Cant see it being much else if as i say we have not had probs before.

Anyone else had similar problems? Or offer any advice.

 

Thanks

have you got amps in?

all amps wired in from previous headunit installation. Nothing in the back, subs/amps or speakers was touched.

 

All he did was fit the new headunit in :(

 

he mentioned something about compatibility issues with the headunit and amp ... is that possible??

i did carpet the board in the boot but didnt touch the wiring apart from diconnecting and reconnecting the rear speakers which ive done about a millions times before. We are running two amps, a vibe blackbox II and a big kenwood mono amp for the sub, not sure on exact specs.

I have been reading other car audio forums and most probs like this seem to be a bad earth but i can't see it being that unless i accidentally damaged something when putting board back in the boot.

yep, it might need a resistor, mine used to do it on my old primera, just take it back and say WTF have ya done to my car, lol

I've already taken it back and they looked at it and said it was nothing they did or did'nt do and it must be another cause but they are not sure what.

well if its only since they fit a new unit then it is something they,ve don, take it back again and play war with em!!!

I've already done that. They say it is'nt their problem. I decided to walk out the place before i did anything i'd regret.

It may just be a coincidence that something broke or came loose somewhere else in the car just after we had it fitted. The thing is the problem seemed to only sart they day after the head unit was installed!

whip the new head unit out and plug the old one back in, see if it still does it, if it doesn't then its the new head unit and not much you can do. you have prob already done this but make sure the amp power cable from the battery and the rca leads from the head unit run down diffrent sides of the car, can causes massive whining sounds if not.

seem to remember there is no ground cable in the wiring loom to the stereo, so if they just pluged in adapter cables it may not ground the head unit. stock was grounded with a wire from a bolt in the back of the headunit to a lug on the car.

 

worth checking the grounding on the amps are still tight, are they grounded to the chasis or back to the battery?

 

are all the speakers run of external amps or are some off the head unit?

 

do the noises come through all the speakers or only some?

 

have you got any neon or electroluminescant bling fitted?

 

possibly check the cable from the head unit to the amps to switch them on isnt a tad loose????

All Speakers are run off amps and noise comes through all the speakers and the amps are grounded to the Chasis

 

Will check all wiring to amps when i get a chance. Although i doubt it is that but i might be wrong

 

Thanks for your advice all.

whining related to engine speed sounds like lack of supresion

 

buzzing and especially crackling sound like it could be a loose connection somewhere

 

i get mild engine whine through one of mine, improved it a bit by disconecting the neon built into the sub. i get very bad high pitched buzzing from the light up pannels in my door sills

 

what you could try is temporarily attaching a jump lead or other fat wire direct from your battery to the amp ground wire where it bolts to the chassis to see if it improves anything

 

only other idea might be alternator strugling or diode pack starting to fail, but i think you said you have a powercap so maybe not, i'll stop wafling now

whining related to engine speed sounds like lack of supresion

 

 

 

how do you cure this?

whining related to engine speed sounds like lack of supresion

 

buzzing and especially crackling sound like it could be a loose connection somewhere

 

i get mild engine whine through one of mine, improved it a bit by disconecting the neon built into the sub. i get very bad high pitched buzzing from the light up pannels in my door sills

 

what you could try is temporarily attaching a jump lead or other fat wire direct from your battery to the amp ground wire where it bolts to the chassis to see if it improves anything

 

only other idea might be alternator strugling or diode pack starting to fail, but i think you said you have a powercap so maybe not, i'll stop wafling now

 

 

your coming round ours to fix it :tongue::tongue:

 

 

(bring your tent to stop the rain coming in) :D

thanx Ian, what puzzles me about the whole thing is, old head unit never one problem in over two years. New head unit and it all starts going wrong?

how do you cure this?

 

in theory by fitting supresion components such as inductors to the supply or feeding wires through ferite cores.

in practice, if i could fix mine i would be a happy man :)

your coming round ours to fix it :tongue::tongue:

 

 

(bring your tent to stop the rain coming in) :D

 

 

way too busy at work at the moment, looking at about an 80 hour week this week :(

when i got my system done it done the exact same thing mine has been off the road for a while so iv not been working on it but everytime i conected a seperate earth to each part the noise got lower, ie head unit then mine has a control box then my dvd player ect it does bring it down a bit im starting work on mine again next week so im hoping to cure it all together but i can hardly hear mine now so im taking it its all to do with earthing

thanx Ian, what puzzles me about the whole thing is, old head unit never one problem in over two years. New head unit and it all starts going wrong?

 

I had cracking etc when i wired my new speakers to the back of the car, i found out that one of the speakers was not attached (wireing was not connected) and it was cracking, i reconnected the speakers and the noise went away!

thanks for your replies all. Car is going in today to be looked at. The guy whos doing it reckons it could be the head unit. Anyone else had issues with pioneer head units? Aparently they are just extra sensitive

as the guy in other Audio place thought, it was definately the head unit. So hopefully will be gettign money back and another head unit. Problem sorted hopefully.

THe only thing being knowone aprt from pioneer makes a head unit with bluetooth and direct ipod control so will have to get separate units!

can you not get the same 1 again or is a common problem with them?

It apparently is a common problem with a lot of the new pioneers. Very good unit apart from the fact they pic up every little bit of interferance.

Sounds a bit dubious to me. The first thing to try in all these sorts of issues is connect a wire to the +ve terminal of the battery and connect it to the main supply of the head unit. This connection is for testing only so just a length of 32/0.2 wire from the battery out of the engine bay, through an open window to the head unit will be fine. If this stops the interference then it's being picked up somewhere in ignition circuit wiring and your options are to run a fuse connection directly from the battery to behind the head unit (easy) or try and correct the interference by adding a capacitor between the supply line and chassis earth (hard). If you still get interference with the direct connection then try adding a capacitor between the main supply line and chassis ground to create a supply filter. A good value to start with would be a 100uF electrolytic capacitor and tune it from there.

 

Dave

It does a bit to me but this dude knows his stuff.

there is an earth wire that sits behind the head unit that goes to the body work, make sure that is connected to the chassis of the head unit, for some reason the loom earth seems to pick up a lot of interference, if not that it could be a corroded earth cable from the battery, unshielded RCA cables or RCA's running next to power cables.. simple things to check first