My 2001 terrano 2 2.7tdi has an alarm problem.
The horn doesn't sound when I activate the alarm. I ran the test sequence, windows open etc, and the alarm works the hazard lights, but no horn.
The horn works from the steering wheel.
Is that a fuse?
I use a chain oil filter spanner, I can just get a grip on the filter, enough to loosen a bit, then the rest by hand. Lovely tool, wouldn't be without it.