Instrument Lights Delay Issue

[Oli]

Basically the issue is at night intermittently the dashboard lights dont come on straight away the headlights come on fine as normal however the dashboard (instrument lights) dont! The full beam light works however things like the speedo and heater, radio aren’t light up? They might come on 5 seconds later or it might be 5mins later.

I was just wondering if anyone has experienced anything like this.

I have checked the fuses and relay's etc they seem ok? Should I replace them??

Any advice would be a great help as im stuck with this one?

Thanks.

Oli