At some point a previous owner has hacked the xxxx out of the wiring behind the dash to directly wire ISO connectors in rather than using an adapter.
However when I plugged in my new headunit it wouldn't turn on. I spent about two hours checking the diagrams and rewiring into a new connector block (each wire had about 3 joins in it between old connector and new one so I figured one might be broken somewhere), and now the head unit turns on, but only for 1 second then turns off again and won't respond. The turning on happens as soon as I plug in the connector, OR if I press the little reset button on the HU (the sort of thing you have to press with a little pin).Does anyone have any ideas? The fact that it seems to power up OK suggests to me my wiring is correct or it wouldn't work at all, and the fact that it's happy to do it whenever you press the units reset button as well, so surely it's getting the right power from the car
- which leads me to think maybe the unit itself is broken and I need to get a replacement. But is there any chance this behaviour could come from a wrong connection instead?