Question about 2002 Chevrolet Avalanche
Horn goes off in low voulmne when car is turned off and all doors are closed. Goes off when a door is open on car started
Posted by Anonymous on
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Posted on Jan 02, 2017
Using a test light check for power at the horn while someone pushs the horn button. also check for bad fuses or relays that are very well labeled in your underhood and dashside fuseblocks. If you have power but the horn dont blow, replace the horn. If you dont have power, go back and dig through fuses and relays. One of these will help to fixya!! Good Luck
Posted on Mar 15, 2009
This problem is caused by a defective door alarm sensor switch, the switch signals the factory security system to not go off, it is attached to the door latch inside the door, replace it and the problem will stop.
Posted on Jun 04, 2009
I've had this problem under warranty on my '05 Malibu LS. They replaced and reprogrammed the fobs. Looking in my shop manual, it seems the problem is from the content theft deterrent (CTD) system. My car started doing this two years later off warranty and now I just lock the doors from the outside with the key or by pushing the lock stem buttons by hand on each door. The security option in the DIC needs to be set to RKE for this to work though.
Posted on Oct 14, 2009
you may have bad horn, take a test light and see if power is going to horn when horn is pushed, if theres power going to it then you have a bad horn,if theres no power to it then check the horn relay. but il bet if the fuse is good then the horns are bad.
Posted on Mar 01, 2010
Go to the wiring on the horn andd run it back to the fuse box. Replace the fuse or "hot wire" system and see if the horn works. It is also possible to ware out the horn by constantly reminding drivers how poor their driving is. I use to sell for a living and drove 60,000miles per year. I burned my horn out 2 times. Good luck
Posted on Jun 20, 2010
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