Parking brake and headlamp warning lights.

[PCB]

OK, so my better half has now had the same problem twice. Both times when it's raining so I'm assuming water ingress somewhere.
The issue is a warning on the dash for "Headlamps incorrectly adjusted" and "parking brake malfunction" I'm not sure about the headlights but there was actually a parking brake problem, as in it wouldn't work. When she removed the ignition key it did work again.
As I said, it's happened both times when it's rained. Also, they both come on together.
I've been out in the car tonight and, as you'd expect, it doesn't do it when I drive it.
Any ideas anyone?

[Whippy53]

One of the myriad of things it could be is water getting into one of the brake units via a cracked casing.

[PCB]

Thanks.
When you say brake units, what do you mean exactly? Something around the wheels area?

[Amo Zirins]

Rear caliper motor usually develop the fault


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[PCB]

Thanks for that. I'll get that looked at.
Any ideas why the headlight warning would come on at the same time though??