I have just bought a z and it is fitted with a sony head unit, only trouble is the rear speakers do not work. On the back of the sterio there is the correct wiring harness fited and all connections seem ok( havent checked coulour of wires yet)

also does any body know of any decent speakers to fit to the rear?

It can be many things, first check the wiring, after that test the headunit in another vehicle, (or take it to halfords and they will check all your channels and preouts)

 

another thing to check is that you don't have everything faded to the front via the headunit,

 

 

 

I managed to fit 3 way 7X5 Kenwoods in the spaces. Mind and check that stock rear amp is out. Its in the RHS behind the wheelarch under the trim panels.

 

 

'Little'

 

I had the same problem when replaing the stock Clarion unit with a Sony head.

 

If your rear setup is stock (ie Standard speakers driven by rear amp) the the rear amp needs a signal to fire up.

 

One of the leads on the Sony harness, none of the speaker wires, says something like 'remote' or 'amp' I think. Basically if I remember right you need to splice this to the spare wire on the Nissan end of the hareness, again none of the speaker wires.

 

It's a while since I did it, so sorry to be a bit vague.

 

Glenn

Don't know if this may help. I picked it up off of a post on one of the other BBs (Ben's Aus forum):-

 

Audio Wiring colour codes made easy!

Here are the colour codes

 

Ground - black

accessories - red

permanent battery - yellow

 

rear right positive - brown

rear right negative - black/red (2 of these!)

 

rear left positive - blue

rear left negative - black and white

 

front right positive - orange

front right negative - black and purple

 

front left positive - green

front left negative - black and yellow

 

Antenna - black and red (test these out because there are 2 black/red wires)

 

is it worth using the amp or is it just as good to use the head unit. I can't realy see that the old amp would be up to modern standards?

what coulour is the amp control wire anyway?

what do the kenwood speakers sound like, my standard ones are shot?

I had the problem in both my Z

 

Previous owner / stereo donkey would NOT be aware that the Z has a SEPARATE rear amplifier.

 

Head unit was replaced, with a 4x40w (this is just an example)

 

The installer would NOT realize that the wires going to the REAR are very very thin...

 

Head unit would be tested, and fire several Watts to the rear, weeding them to the amplifier that is only waiting for a couple MILLIWATS.....Amplifier FRIED !!!!

 

The only fix I've found.

 

Route DECENT wires from the head unit directly to the rear loudspeakers....it works

 

Zee you

 

------------------

1990 300ZX 2+2 TT (Z32) Auto Stage III

1992 300ZX 2+2 TT (Z32) Manu Stage VII

1992 Dodge Stealth 2+2 TT AWD Manual

 

Internet Z Car Club #1000

TwinTurbo.Net #4

Im in the same situation.

However as i dont relish re-wiring the harness that goes in to the back of the head up the only easy solution i can think of is to buy an amp to power the rears and run a couple of RCA's and power cable from the headup. This would eliminate the speaker wiring harness issue.

After you've taken out the stock speakers you'll realise it isnt worth trying to get them working in the first place.

Any suggestions on what speakers fit in place without having to get the hacksaw out?