Hi there, I had a similar problem years ago, that is why my alfa alarm was permantly switched off in 1998. Get yourself a new one, I found that the alfa alarm was never that good anyhow, it just made you feel alittle better!
Hope you do manage to get a reply that actually helps you. Id go for the earth connection, give it a clean!
Hi, Ok the 155 alarm unit is under the nsf wing protected by the inner wing cover, they get water in them and also have problems with loom connections. First job is to check the loom down behind the ns headlight, there is a multiplug of about 20 wires which are all black, pull it apart and check for green contaminated connectors. If they are not too bad use some terminal cleaner and plug the loom back together and retry it. If this doesn't work then you need to remove the wing cover and remove the alarm unit. Give it a shake and it will probably have water in it. If so chuck it and get a decent Cat1 alarm, it will be far cheaper than having a new AR one.
finally managed to have a look tonight. I found the re-arming proceedure on this site [img]smilies/wink.gif[/img]
Place the key near receiver in roof and press for two seconds - no response.
Previous advice reckoned this suggests a wiring fault between the receiver and the car. The LED on the steering column was flashing steadily, I presume the alarm is arming ok but cant switch it off unless I use the glovebox switch.
The LED on the key flashes, I seem to remember it being a constant light???
Can any1 suggest anything else or confirm the problem before I go diggin about in the headlining.
Hi wrinx - have had a similar situation with the 'plip' on my 155. Changed the batteries in it - no luck. Took it apart again & found that the transmitter bulb inside had come unsoldered. Try a local electrician for advice...