Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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I posted in ICE a few days ago about a problem with my head unit.
Basically, My Headunit has worked fine! no problems Wired a sub & amp to it and still no problems, one day I decided I was fed up with wires through my car so I decided Id wire it through the plastic cowling around the doors. did it all wire it back up tested and it worked.
when I wired it up I sparked the amp slightly when re wiring, made me jump! but it still worked.
went back to use my car later and no sound but everything powered up. I de wired the sub and amp and still no sound.
I contacted the ebay seller and sent the unit to be tested. my unit is at the back end of its warrenty so they sent me a refurbished one. Obviously not refurbished well enough as that didnt have any sound output either.
Parcel force collected it and another one arrived today, this was a downgrade and also a refurb.
guess what?
No sound from this unit! whats going on is it something my end or is it just bad coincidence all the units have blown internal amps?
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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what make of amp and sub is it etc ?
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matt_aka_smiler
Member
Registered: 7th Dec 05
Location: Stoke-on-Trent Drives: MK4 Astra GSi Turbo
User status: Offline
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have you blown the fuse mate? i sparked mine before and same problems your having. turned out to be a blown fuse on the power wire from the battery
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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quote:
Originally posted by DAZ1985
what make of amp and sub is it etc ?
Ignore the amp & sub for now, If I get sound I'll worry about them.
@ matt,
the unit is wired up and powering up, Its wired into the normal loom the sub & amp are wired direct from the battery, currently they aren't wired up.
I've just got nothing through the speakers, the unit usually beeps on function but not even that?
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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ttt 
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matt_aka_smiler
Member
Registered: 7th Dec 05
Location: Stoke-on-Trent Drives: MK4 Astra GSi Turbo
User status: Offline
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id check my wiring from the unit. I'm guessing you mean your getting no sound through the normal speakers? and you don't mean anything like 6x9s
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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I've got after market door speakers, tweeters and 6x9's wired in as normal. I havent touched any wiring except for the sub & amp
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shauny bizzle
Member
Registered: 2nd Aug 06
Location: Sheppey, Kent Drives: Vectra GSI V6
User status: Offline
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check fuses what bout door speakers earthing out on the door itself it happened to me a while back
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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try the headunit in a mates car if it works then its your wiring, too much of a coinsidence to have 3 headunits all with the same fault. shame your not closer i got a 12v testing pack.
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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quote:
Originally posted by shauny bizzle
check fuses what bout door speakers earthing out on the door itself it happened to me a while back
would the earthing stop 6 speakers working?
what fuses do I need 2 check?
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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tested head unit and it works
tested a speaker and it works
changed wiring (externally) and works
something has gone wrong (internally) wiring wise thats stopped 4 speakers working.
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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sounds earth related to me.
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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quote:
Originally posted by Robin
sounds earth related to me.
Have I got to laboriously check the wiring through the car?
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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ttt
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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if its speaker earth problems just put new in
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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quote:
Originally posted by Hoddo
quote:
Originally posted by Robin
sounds earth related to me.
Have I got to laboriously check the wiring through the car?
I'd say the problem was in the door hinge area
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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an earth there would stop all working?
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
User status: Offline
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if the speaker wire from the back of the stereo was earthing then it would, I think.
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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well, ive trial 2 sets of looms and the unit from the car! an they work! gona have a look around tmoz wen the 1st time it stopped i ws getting a crackle from the rear!
Turning the igni on made a pop snd in the speakers!
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Simon_16v
Member
Registered: 14th Aug 06
Location: Yorkshire
User status: Offline
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Could have a short circuit then. I had that when i wired my back speakers to an amp, the old wires were touching and causing interference
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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i havent even wired back up the sub n amp! all other speakers bypass the amp to the unit
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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sorry for poor anagrammatic posts. was on a touch screen keyboard at work! pain in the ass.
here is my full status so far.
Stereo fully functional, decided to rewire sub & amp. while doing so I'm 99% sure I didnt touch any other wiring. Reconnected amp to direct feed from battery. I got a small spark but after testing the unit everything was okay.
I return later and the unit isn't making any sound but powers up fine. The speakers were however making a pop sound when the ignition was turned on.
I've trialled 3 units within the car and they're all non sound producers.
I wired the latest unit up indoors and removed a door speaker to check the speakers were functional. everything worked perfectly. I disconnected the loom from the car and tested that with the head unit inside and that worked.
I've also checked all fuses on the drivers side panel below the steering wheel.
Im now at a total loss as the title suggests
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Hoddo
Member
Registered: 7th Nov 06
Location: Wallisdown, Bournemouth
User status: Offline
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Im pretty sure its the pre-amp blown on the unit. Its fine at low volume but distorts as the volume increases. I've tested this on various speakers.
I guess the head units I've been using just aren't powerful enough to support the system I want.
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