[urq] radio problem

[Keith Lloyd]

OK, I've done somethng silly and now can't see the wood for the trees.
My Blaupunkt CD player was playing up and so I decided to change it for a Sony. Silly me plugged in to the sony via the bunch of leads already attached to it. It worked briefly and then nothing. The unit still works because if I find a fresh permanet live (cigarette lighter) and a suitablle earth it fires up. However, the original live feed is now dead. Why I don't know. Does anyone know where the red wires come from? There are no blown fuses in the fusebox. Does the permanent live for the radio come from somewhere else with it's own fuse? If so where?
I'm really puzzled and very tired so not thinking straight, I have not noticed anything else not working which would be a clue.
Any assistance gratefully recieved as usual.
Many thanks

Keith

'87 WR

p.s. just to confirm - I only need 4 wires to the radio right? permanent live, earth, illumination and feed to electric aerial.
The autocheck has it's own separate speaker on my car so no feed to NF on radio.
Cheers