Hello i have a 1999 A3 1.8t which has a aftermarket Kenwood PS9521(i think) headunit fitted. It has all the audi wiring intacted and is plugged in via the iso blocks.
Its has been fitted for about 2 years and until today worked fine, but has now stopped working.
I checked the fuse on both the headunit and in the fuse box by the door and neither have blown. I next removed a working sony headunit from another car and plugged that in and it also would not work in the audi.
So the problem is with the car not the headunits, but i not sure what else it could be, all the wires going into the iso blocks on the car are in place and not lose. I've checked the three fuses by the battery and they are all fine too, are there anymore hidden away?
Thanks for reading this and any ideas!!