Technical Fiat 500/Ford ka stereo

[jedeacon94]

Hi

I used to own a Fiat and remembered how helpful you guys were.

I am fitting a stereo on the girlfriends KA 2009, believe it's based upon a fit 500 so though maybe someone could help.

It has the awkward quirk of no switched live, I rember my Fiat was the same and I simply used the permanent live and manually switched on and off.

However, this one wasn't as simple.

The wiring diagram wasn't that clear - inpurchased the ISO connectors, transferred switch live to permanent live and nothing happened.

So I transferred the ISO yellow connector across to a wire marked 30 on the wiring diagram and it worked. I have no clue what thirty meant.

One of the things I'm worried about is that it uses this canbus system and I don't want to screw anything up.

Interestingly as well, the negative wire was lose and it popped out, but stereo remained on - weird? I clipped the negative back in securely but wondered if the 500's were the same or anyone had an idea

See attached wiring diagram

 

[jedeacon94]

Wiring diagram

 

[John202020]

The aerial will provide a "poor" earth hence why it will still work, if in doubt run a new switched live don't gamble if it's connected to anything it could break, you could use the "power/lighter" socket for a switched live.
So 30 on yours is the permanent live feed and it looks like it does not require a switched one. It's the can system that turns it on off

 

[John202020]

Here's a pic from the rear of ours that may help

 

[jedeacon94]

Ahh the aerial thing makes sense.

I've connected it to the 30 for now - it works fine - when I pull the fuse from the fuse box for the stereo it switches off too. So I guess that means it is the permanent live?

The CAN B wire snapped during install - I taped it up to stop it contacting anything and considering it doesn't go anywhere it shouldn't cause a problem right? I could get a new ISO pin and connect it in but it doesn't actually have anything feeding the stereo

 

[John202020]

Does the radio switch off when you remove the key? and come on when started? and does any dash display work correctly if it did/does display the radio information? and steering wheel control where fitted? just your loose wire may effect these? This assumes you've fitted a canbus compatible radio and that the picture is of the rear of the new radio

 

[jedeacon94]

Sorry I was probably a confusing - the picture of the wiring diagram was of the old stereo - I used it for reference when attaching he new stereo.

The new stereo has no canbus, it's just purely 12v wire and that's all it needs to power up.

So I've fed the 12v from the wire that used to go to connection '30' labelled on the old stereo - it seems to be a permanent live - I was just worried it may be a canbus wire but it seems to be ok.

And so the stereo is permanently on - cause there is no switched live - but if I pull the fuse for the radios from the cars fuse box the stereo turns off and loses all memory - so I'm hoping this is a sign that I have correctly tapped into the perm live

 

[UFI]

Ideally you would use the proper CANBUS adapter.

 

[John202020]

Ah if your new radio has both permanent live and switched inputs a cheat is to connect them together then it will always work but has the risk of being left on silent during the day and on all night lit up, if that's the case as I suggested run a wire from the lighter socket for the switched feed ideally through a fuse 2 or 3A would do ( not essential but good practice, just next to the lighter socket )