I have 2004 range rover. car is fine but air bag light is on. some time get off.

height sensors may have failed or air bags faulty but this should produce a fail code.

So many problems at the same time indicates that a negative main plug is disconnected from the chassis

Multiple things can cause a horn not to work. First thing, is the air bag light on? If so, odds are you have a bad clockspring behind the driver's air bag module. If this is the case, none of the electronics on the steering wheel will be opporational. Next thing to move on to is simply the fuse for it. If that is not the case, you will have to omh out the wires to insure no breakage in them from the fuse block to the connector on the horn and also the ground. If all checks out fine, the only thing left is the horn it's self. Which there should be a High note and Low note (2). Hope this helps.

Try using a scanner to read codes or re-activate, also have a look at the air suspensions bag/balloons, might have a leaky one. If so change, check air suspensions activator unit too. Valves may ber bad.

you've got to check all the connections and wiring to all of the bags and the module. the module may need to be replaced if the airbags went off. and you'd need to bring it into the dealership to have them program the replacement module.

the system should raise the truck within a few minutes, if it doesn't u most likely have leaking air suspension bag(s)

2-3 seconds

Airbag resets need to be taken to the dealer or someone with access to the right diagnostic equipment(unlikely) Store bought code readers will not work.

I would recommend going to strutmasters.com and taking a look at our conversion kits. these convert you from the airbag to a powder coated American made steel coil spring that is guaranteed to last the life of the car. Airbags and compressors are constantly having to be replaced. Also something alot of people don't know is that theses air suspensions are not meant to be in temperatures above 90 Degrees or below 40 Degrees. That is most of the world. The temperature will cause you to replace alot of bags. and typically when your replacing a bag you are going to have to replace the compressor to because the bag had a hole or small crack in it causing the compressor to over work and it will die. I posted the link below so you can take a look

http://www.strutmasters.com/land-rover-suspension-parts-s/21.htm

I hope I was of some help

Good Luck!!!

there is is kit that comes together with the coil spring if you buy from landrover dealer, that block out the light. Its a simple socket that you plug into the system.