Alarm questions

Hay just a quick question, I have a 94 300tdi discovery ES. it hasnt got central locking (does but not working and no fob) so I have to open and lock with the key.
Right, so when I lock the drivers door the indicators flash 3 times to say the alarm is on, but then if I open another door (alarm still armed) all that happens is the indicators flash, no horn blaring or owt.
My question is, should the horn go off? So is mine broke? The horn works fine when I press the steering wheel btw.
Cheers
Chris

as long as you can still get in and it starts i would say was a bonus

Yes and no it's not broke if it sounds. The supply is provided by the alarm ecu in an alarm condition, so this supply must be missing either at source (ecu) or somewhere in the wiring.

Well yeah :L but it's a bit of A crap alarm as it is.

I'm assuming, as with most land rover electrics, will be a bit of a job to sort it out.

Depends on your skills i've yet to find a wiring/schematic diagram for the system so it will be a matter of 'metering' the wiring to find the horn circuit, then after that u may find the ecu is faulty.

There's two horns on the car, one "normal horn" and one for the alarm.
The alarm horn is located on the inner wing next to the engine compartment fuse box.
The alarm horn may be u/s or not there at all.

Thank you for the helpful responses will try and find the alarm horn

nicedayforit said:

There's two horns on the car, one "normal horn" and one for the alarm.
The alarm horn is located on the inner wing next to the engine compartment fuse box.
The alarm horn may be u/s or not there at all.

Click to expand...

That will be a battery backed-up sounder, not used on the 200 series single button system that is fitted to a 94MY disco.
A single button system still uses the vehicle horn.

discool said:

That will be a battery backed-up sounder, not used on the 200 series single button system that is fitted to a 94MY disco.
A single button system still uses the vehicle horn.

Click to expand...

Mine doesn't, two horns.
The alarm one isn't backed up by a battery.
94 300ES tdi