ABS, VSC and parking brake warning lights coming up in instrument.

Customer advised us that this issue had been intermittent for some time, and would occur when braking in loose gravel, or on a wet surface.

Able to confirm that warning lamps would illuminate when the braking system went into ABS mode due to excessive wheel slip (i.e. braking on low traction surfaces).

Warning lamps would sometimes reset with an ignition cycle.

Ended up tracing fault to a faulty ABS power relay.