So my mk3.5 had the ford factory sub woofer installed, which a was worse than useless. So I've moved over my sub install from my old cae. Fitted, all wired in and I've tapped into the Ford subwoofer loom to get signals.
All works perfect for about a week, then it's like the head unit stops outputting the sub output. The amp is still powered and the amp lights are on as normal. I'm 99.9% certain it's not loose wiring. As when it goes off wiggling all connections doesn't result in it coming back on.
Only way to get it to come back on is stop the car, get out. Lock it. And then start it again. And it can stop mid journey.
Any ideas anyone?