Hilux 4x4 Forum

Hi everyone, does anyone know where to look if the rear diff lock on my 2007 D4D Hilux is not engaging, the indicator light in the cluster is illuminating when I depress the diff lock switch, but the diff lock does not operate. I have had a diagnostic done, but the diff lock circuit does not feature...

I have difficulty seeing detail on my Mark 6 Hilux intrument cluster during daylight, due to the colours of the faceplate.
I do beleive that a white faceplate is availasble, does anyone know where I can purchase such a faceplate?