Last year I replaced the standard fit stereo with a cd player and a row of gauges (analogue clock, boost, voltmeter).
I kept the original radio control/digital clock in the top slot and took my permanent live power feed (+12v before ignition) from this to power my new cd player and analogue clock. But now, the digital clock has gone off, the analogue one has stopped and the cd player wont power on.
At first the fault was intermittent. The digital clock would come back on displaying '8888', so I could reset the time and I could set the time on the analogue one. But there would still not be enough power to turn on the cd player and a few minutes down the road the clock would go blank again. It also affects the cigarette lighter socket. I plugged my 'drive-smart' unit into the lighter socket when the clock was working, but I only got a faint voice saying the unit was activated but wouldn't power up.
Only seems to be he +12v before ignition affected (red wire). The +12v after ignition (yellow wire) seems to be working because I can set the time on the analogue clock when the ignition is on. Digital clock and cd player still don't power up even when the ignition is on.

There are a couple of unused plugs behind the dash left over from the original stereo: red (+12v before ignition), yellow (+12v after ignition) and black (earth). Ive tried taking feed off these too but they don't work either.
I've not had time to test the wires with a multimeter yet but has anyone got any ideas?
Thanks.