Just bought a Sony DSX-A400BT headunit and it wont power up?

I've bought an adapter and spliced the larger red cable from the adapter into the ciggy lighter but still no power??

No fuses are blown, just a very confused me.
Pictures below;
1) picture of the sony headunit cables
2) cables from the sony headunit
3) the adapter red cable going into the ciggy lighter
4) the adapter going into the Punto Headunit cables.

thanks!!

Is the power at cigar lighter?
If not try again with ignition on.
Is there power at light now?

yes theres power at the cigar lighter (i can tell by using the lighter itself and a bluetooth dongle i used before lights up and is working)

If you have volt meter , unplug connector from head unit and check battery voltage at connector between ground wire and battery +ve.
Or use a 12v bulb between the two wires.

example of the 2 wires? theres too many+im a newbie

Sorry, we are trying to check that at the connector that goes into head unit
There is a working +ve wire (from cigar lighter) and a working -ve (also called a ground wire)
Did the instructions with head unit say connect red to cigar lighter +ve?
The cigar lighter +ve is the connection in the centre of the hole .
Are you 100% certain you have correct adapter cable?

Bought it from halfords so not 100% sure as you know what they are like!!

he took my numberplate and said it would fit but on the box is says for Peugot/Citroen? questioned him and he replied with 'its fine it will work'

Ok put thought about halfords to one side.
Coming out of back of head unit any idea why there is a red wire connected to yellow wire and yellow to red?

Wires from back of head unit the two single wire connectors, connect red to red and yellow to yellow.

I'd suggest to use a Sony to ISO adapter, should be straigtht forward; something like this:

http://www.ebay.com/itm/Sony-Iso-Wi...CDX-G3150UP-DSX-A40UI-DSX-A60BT-/321820061146

Regards, Bernie

Be aware that Punto's are Canbus systems, so likelyhood is you'll need an adapter harness for it.

Autoleads do one, part# PC2-86-04

i'll find the adapater i have and will link it as i think thats whats causing the problems!

Just changed the red to red and yellow to yellow.

www.halfords.com/technology/car-aud...utoleads-harness-adaptor-iso-to-iso--pc2-32-4

that is the adapater i have

You have done all you can.
Go back to halfords you bought it from with the car and ask them what's wrong, politely.
Hopefully they have a fitting guy who will know straight away.
It could be the head unit faulty or a faulty lead .
Huge well done trying to fit and fix it yourself , you have just been unlucky.

jackatha said:

www.halfords.com/technology/car-aud...utoleads-harness-adaptor-iso-to-iso--pc2-32-4

that is the adapater i have

Click to expand...

You have the wrong harness, that is for Citroen/Peugeot applications.

Ask Halfords for PC2-86-04

brickfoot said:

You have the wrong harness, that is for Citroen/Peugeot applications.

Ask Halfords for PC2-86-04

Click to expand...

thought so, will report back

brickfoot said:

You have the wrong harness, that is for Citroen/Peugeot applications.

Ask Halfords for PC2-86-04

Click to expand...

http://www.halfords.com/technology/...ess-adaptor-pc2-86-4-citreon-fiat05-peugeot05

this one?

Just bought http://www.halfords.com/technology/...ess-adaptor-pc2-86-4-citreon-fiat05-peugeot05 but now the original harness from the car wont fit in the adaptor?

jackatha said:

Just bought http://www.halfords.com/technology/...ess-adaptor-pc2-86-4-citreon-fiat05-peugeot05 but now the original harness from the car wont fit in the adaptor?

Click to expand...

Rather odd, since it's what is recommended by Autoleads.

Not sure what else to suggest

Your car already has a standard iso lol.

Remove the autoleads harness, and connect the sony one to your cars standard iso, also if it doesnt power on, join red and yellow together on sony harness as the fiats are permanent live on stereo iso harness... not switched so memory feed and switched live go to permanent feed, usually u can swap the bullet connectors and bridge them