http://www.howtothings.co.uk/thread-1893.html Here is a link to an install on your car (I think) make sure it is the right vehicle/year, in the tutorial he shows that he indeed DOES have to switch a wire around for the switched 12V+...so maybe the EU people are just wacky at wiring cars (imagine that, right? lol)
Thanks for the help, but I'm finding it hard to follow SHOme1289's instructions (because wall of text). Mind organizing those on steps? This is a photo of the Pioneer ISO connector with the colour of the cables: And this is a photo of the ISO connector coming from the car, with 'where the Pioneer ISO connector cables' would connect. (Forgot to take a picture of the cable colour, but anyway those have a completely different colour codes.., dunno) Yellow? Check Red? Not present White/Black (Black Cable, mass)? There, but on the other side Red? Not here The issue as I said above, is that the original radio knew when it had to turn off because it worked on a CANBUS (A sort of connection with the onboard computer. So as soon it detected you turned off the car, it would switch off). An aftermarket radio do not communicate with the onboard computer, so if take both RED/YELLOW cables on the Pioneer ISO connector and link both together to the YELLOW cable, it works, but it's like the radio is taking its power source directly from the Battery (so even if you turn off the car, it stays on, which is no good). The RED cable, as said above, is what 'theorically' should be used for the 'On-Key' input, but it's not present on my car. I read on some GP forums, and they say I could take it from the Key-Hole zone, so that's supposedly a solution (but I'm afraid of starting taking cables from there. What's with the Blue/White cable Shome was saying about? As you see, it doesn't connect to anything on the car ISO connector. Damn Fiats, making something simple a total mess :|
the blue you likely dont need anyway, its often disconnected. The fiat has a fixed place antenna right? The blue is just a signal to extend/retract non fixed antennas. Blue is so rarely used that in many aftermarket stereos, they attach a bit of blue wire to the back of the actual stereo but stick a bit of tape over the end rather than connecting it to the ISO socket, got to crimp it in yourself if needed. So yeah, you now need to find some form of switched 12v source that comes on/off with the engine to tap into. The first one I tend to think of in any car is the cigarette socket, if a phone charger cuts off when the ignition cuts, then thats a switched socket, tap the red wire to the pioneer into the back of it. Otherwise, next safest is a fuse tap. Find a switched socket in the cars fusebox (manuals and google may help, plan B but more laborious is a volt meter across each socket individually to see if the voltage changes with ignition). These taps can be used in parallel with whatever originally used the socket as they allow 2 fuses to be mounted, or they can be mounted in an unused socket (such as my focus not being fitted with heated seats but still having the wiring present). Stick the original fuse for that socket in the lower location on the tap, I'd go with a 10A fuse for the top location, then you simply have the conveniently red wire coming out that can go to the red wire on your stereo. I picked one of these up for my dashcam, but ultimately I actually connected it to the back of my stereo harness anyway (which is a little more complete than fiats it seems).
It looks like the Fiat's ISO socket is wired up differently to the usual standard. I would either - find an adaptor make an adaptor or cut and start over, just solder the wires up into the body harness (do it with old cars all the time) You need to find (using a multimeter) Constant 12v = which you connect to Yellow a Switched 12v = Red Ground = Black (I always unbolt something and place it on) Illumination (when lights are switched on, not all cars have this) = Orange some cars also have an aerial booster when they have a small fixed aerial. you would connect the "remote" trigger to this. speakers - I use a battery to find the speakers, so after isolating the power wires you need get a AA battery and run across the left over pairs to popple the corresponding speaker.
