Four problems related to horn assembly have been reported for the 2010 Dodge Nitro. The most recently reported issues are listed below.
Door locks failed to lock and unlock. Keyless entry sends signals succeccfully, lights and horn all flash, but doors wont open;even from the door panel in the car. Found faulty fuse (m38) in tipm (fuse box). Once changed the rear window wiper turned on and would not turn off. I paid an auto tech who took control over sysytem with diagnostic equipment, and by passed the wiper switch. He was able to control the front wipers, lights, horn and door locks remotely (while m38 fuse was installed) but he could not turn off the rear wipers. They stayed on even when the vehicle was powered down, key out, doors open. He said the fuse box was faulty, because everything else was working when he sent commands to the computer. I had to pull the fuse to get the rear wiper to stop, and now I cant use the door locks. I don't know if this is related, but at idle the car stutters like is going to stall. I am afraid to drive this car for fear I might get stuck if other things begin to blow/short.
Low beam headlights do not work most of the time. One or the other might work at random times. Removed horn fuse as the horn would honk at random times for various amounts of time. Can not drive this vehicle safely in the dark.
10/07/2012 at 3:00pm on Sunday afternoon, the horn on the vehicle started blowing for no reason. It sounded like someone was trapped in the vehicle and trying to get attention. This went on for and finally stopped on its own just as it had started on its own. Nothing else happened for the few days. 10/13/2012 at 2:30 am on Sunday morning, the horn started to blow again in the same manner as before except I removed the fuses to get to stop. I took it to the Dodge dealorship and was told they could find no problems. Two days later horn went off again I called the dealorship and was told to bring it in. I was pulled over by the police . The police thought I was " under distress" had remove the fuses and proceed on to dealorship. Upon placing the fuses back in the horn would blow at random again. A master control computer and was told it was fixed. It started again random horn yesterday 10/23/2012 dealorship took straight to dealorship they still have the Nitro.
11/28/2011 at 3:19 am on Monday morning, the horn on the vehicle started blowing for no reason. It sounded like someone was trapped in the vehicle and trying to get attention. This went on for about 35 minutes and finally stopped on its own just as it had started on its own. Nothing else happened for the next week. 12/5/2011 at 12:13 am on Monday morning, the horn started to blow again in the same manner as before except only for a short time (approx 30-45 seconds) it would start and stop at random over the next 7 hours. The horns are hidden in the engine/bumper area so my only choice was to disconnnect the battery. This was done by the prompting of the police officer that answered the "distress" call that he had received from the 911 dispatcher. Upon hooking the battery back up the next morning, nothing was abnormal until I started to drive to work. The horn would blow at random once again for the entire 36 mile trip to my job. I called the local dealer that I purchased it from and was told that this was an unknown problem to them and I would have to pay for the diagnostics and repairs. I think this is sad to have a 22 month old vehicle that was purchase brand new and have this type of problem. I researched the internet and found which fuses control the horn circuit and removed them to keep the peace with the neighbors and not anger other drivers . I have had 3 encounters with other drivers not paying attention and needed to signal them, only to not have a horn. I was forced into oncoming traffic last night (12/7/11) , no accident, but real darn close. I didnt realize how important of a safety item the horn is until I didnt have one. This problem is not related to the factory security system.