Horn Assembly problems of the 2002 Buick Rendezvous

We have a Buick Rendezvous. The car's interior lights go off without warning, and it becomes impossible to see dashboard lights, including speedometer, at night. Other times, horn will start blaring for several minutes with no warning. . . Almost caused an accident yesterday. . . It startles anyone around. Now, when we turn off the car, the headlights won't go off at all, no matter what we try. Will have a dead battery next time we go to drive the car (tomorrow morning).

Starting sometime at the end of October 2007 into November of 2007 my 2002 Buick Rendezvous started having starting problems associated with the security system. Vehicle would intermittently not would be hard to start or not start at all. If jumped off the alarm system would go off. Sometimes the radio would not come on, a/c would not come on, lights would flash, etc. In late November the vehicle finally went haywire and started blowing the horn, lights blinking and lights not going off after vehicle was turned off. Disconnected battery repeatedly to reset until that would no longer work. Took it to the dealer to have it checked. Was told it was the bcm. Had bcm replaced and reprogrammed. On March 14, 2008, vehicle started doing the same things that lead up to this part being replaced. Am taking it in again this week if I can keep it started. Doing this complaint because after reading various internet blogs, forums and chats this problem seems to be a recurring problem for many 2002 Buick Rendezvous'.

Various electrical problems. Horn only works some of the time. Sometimes engine will not crank only the warning lights come on but no engine crank. Various chimes for delayed door locking etc. Do not work. Special programmed features do not work such as removing the key from ignition should open locked doors. Bcm has been replaced but problems persist. Dealer states they cannot recreate problems while in service. No events lead up to failures, just started to occur.

When driving 55 mph rear right tire blewout. This caused the consumer to pull of the road and change the tire. Consumer stated that the tire looked like it just melted ,and there were no objects and the road. This was a firestone tire. The consumer noticed that the passenger side front floor mat was wet. The technician determined that the a/c evaporator drain was clogged due to leaves coming from the windshield cowling. The dealer cleaned the drain and removed the leaves. The left front hub and bearing had excessive play and were noisy. The check engine light illuminated. The trouble codes indicated that the gas cap may have been loose. The vehicle body control module (bcm) failed and had to be replaced. It caused the security lights to remain on, the a/c not to work and at night the horn would sound when the vehicle was off. After the consumer locked the door the vehicle radio would come on. This caused the battery to drain and as a result the vehicle had to be jump started.

The consumer stated the horn would blow and the radio would come on for no reason. The consumer took the vehicle to the dealership for inspection; however the mechanic could not duplicate the problem. The consumer had taken the vehicle to another dealer and they fixed the module the same day. There has been no other problem. Currently the vehicle is in security mode. The consumer was unable to open the windows and the rear doors. The consumer noticed the floor mats were discolored , it was determined that the air condition system had malfunctioned. There was a screeching noise in the steering column, but no problem was found. The left front hub and bearing was replaced the brakes were replaced.