Triton 4x4 Lights flashing

[Die SwartKat]

Hi all. The sticky thread did not contain anything similar so here is my issue.

After returning from a recent trip driving in severe dusty conditions, the Triton's 4 wheel lights does not go out. It flickers and has been doing so ever since.

I thought a good turbo spray wash in the engine bay and/or under carriage would get rid of whatever is causing this but no.

With the Colt I've been able to tend to its similar issue myself, but have no idea with theTriton.

Has someone had a similar experience and if so, where is the little actuator pump/vacuum switch/solenoid/sensor culprit thingy situated so I could address it?