The horn in my Disco ('94 200tdi) has stopped working. I've checked the horn itself and it works Ok, and so is the switch (Ive checked the voltage across the fuse).
Tracing the wires ive found that it seems to be switched through the alarm unit, does that seem right? If the alarm goes off then the horn does work. Does anybody know what may be causing this, do I need a new alarm unit? (the Haynes manual doesnt show this part of the wiring!)
Please help, I have got my MOT coming up!
Many thanks
Sam