Central Locking Fault & Other Electrical Gremlins

[keeyth]

Hi all,

 

I have a couple of electrical problems that I could do with some help with,

 

The main problem is with the central locking,  I press the key fob and the indicators flash to confirm the alarm is arming but none of the doors lock, Using the key in the drivers door has the same affect although the petrol flap locks the other doors and tailgate refuse to respond, The lock/unlock button on the drivers door arm rest has also joined in the fun by not working, All the fuses in both boxes check out ok and I can't see any evidence of broken wires in any of the door looms and tailgate loom, The tailgate itself now only opens with the key but could a fault here kill the whole system?

Another gremlin that was noticed at the same time (could be related or just coincidence) is that both heated screen switches have lost there on/off illumination lights although both screens defrost without issue.

And finally I have flickering lights, It doesn't matter weather it is a headlights or dash lights, as long as it's a bulb and it is on it flickers, An alternator fault would normally spring to mind but the lights have been seen flickering without the engine running, I have heard rumours that this could be a battery lead issue

[chrispb123456]

MK 1 or 2, year and engine type please.