Half gauge cluster lights not working

[K7RXX]

Got a strange problem, half my gauge cluster lights arent working as well as the cigarette lighter light. Two of the 501\'s aren\'t working, and some of the 286\'s. Its not faulty bulbs. All other interior lights working fine.
Had a good look and cant see any damaged wires.
Surely its only one loop to feed the lights?
I dont think I have a faulty gauge cluster as the cigarette light isnt working too.
Any ideas please or a simple wiring diagram for the gauge cluster would be a good help. Want to get this sorted so I can put my dash back together.

[K7RXX]

bumpage
still stuck with this, any ideas please

[probedb]

I traced some of the lines and I think there are at least two so one could be dodgy or it could be a dodgy ground on it?

[K7RXX]

Oh really? Thanks for the reply. What colour wires did you trace?
I\'ll start checking the grounds, black ones I hope but probaly not lol

[probedb]

This was on the back of the clocks, you can follow the lines to where the plugs go in and I\'m sure there isn\'t just one for all the lights.

My odometer is still screwed, no idea why. Think it needs a proper look at that one.