This has been an intermittent problem, resolved temporarily by system off/on. Dealer installed $600.+ worth of new brake hardware; no help.Returned to be told(after days) that $2000 part was needed. Took car to street mechanic, who removed and replaced pertinent fuses and relays (same parts) no problems for six months. Prob came back, took the cover off the fuses and relays under the hood, while alarm wailed and lights blazed; tapped on relay =lights off, alarm silent function perfect.