Had my Electronic Parking Brake module replaced under warranty 15 months ago as previous one fitted earlier failed after 4 months, all done by LR dealers, the problem is when it rains the EPB light flashes while driving and does not engage when parked up, however after being left overnight the handbrake has engaged itself as normal, has done this twice now but only when it rains, any ideas please. 2009 2.7 TDv6