Evening, As servicing and changing the belt took longer than planned the battery ran down. I charged it up but as soon as i switched the battery on the alarm went off, i could start the car but it kept going. I have unplugged it . I have found a thread referencing an internal battery, is it a simple case of opening it up and replacing the battery ? Thanks
It can be harder than you think. Many sirens have to be cut open. The plastic is hard and you have to make sure you don't cut through certain parts of the case. The batteries (two) have to be soldered into place (removing is harder unless you cut the legs off the old battery). The case then has to be glued or heat welded back together. Batteries can be found relatively easy online. Google "Varta V150 NiMH rechargeable battery". Ferrarichatter "Gobble" can probably make your life easier by sourcing a cheaper siren, opening up the case, reprogramming the electronics and optionally fitting a longer-lasting battery. Where are you located?
Dead siren batteries will not make siren go off. He may have dead batteries but it is not his immediate problem.
Do you mean it could be faulty siren internals other than the battery, Brian, or something completely different? It seems odd that the siren is going off, but he can still start the car. Graham, did you give the fob an extra long push to try to cancel the alarm? I've been told that sometimes works.
"Graham, did you give the fob an extra long push to try to cancel the alarm? I've been told that sometimes works." ****** FWIW. recently had immobilizer/siren problem with 575. Wouldn't respond to usual routine to start, no chirp-chirp, etc. Wasn't sure if immobilizer wasn't also faulty but after trying various "monkey and typewriter" sequences, inserting key and turning to "on" then pushing fob button allowed to the car to start reliably. Siren was faulty, replacement was ~$380.00 + labor. My understanding is that the battery quite often leaks and damage the surrounding electronics.
