Hazards flashing when car locked

[RedCarsGoFaster]

That option for the key location does ring a bell - will check tonight. I still don't think I'd have the key, but it would explain why the siren isn't sounding.

The LED flashes confirm it's an ultrasonic sensor triggering the alarm. The manual did include instructions for changing the sensor programme, so I've fiddled and beeped in the appropriate order and I think they're now disabled. Will count flashes again tonight.

[RedCarsGoFaster]

So, update . . .

The system is now configured with the ultrasonic sensors disabled, which has stopped the alarm triggering. With guidance from HP I've located the alarm control box and it does look like they're tunable, though for now I'll leave them disabled.

I have no siren key switch in the glovebox. There is a key switch on the back of the siren unit itself, but I still haven't found a key. No spare sirens of this type are available.

Thanks all for your help, but it seems that if I want a fully functioning alarm on my car I'm going to be forced down the route of a full replacement system.

[Pride]

So, update . . .

The system is now configured with the ultrasonic sensors disabled, which has stopped the alarm triggering. With guidance from HP I've located the alarm control box and it does look like they're tunable.
No spare sirens of this type are available.

There are 2 control boxes for H&P system, the larger of the 2 is the main control box, nothing to adjust in this. The other much smaller black control box is for the sonics, a small electrical screw driver turned counter clockwise on the only externally visible potentiometer knurled knob will turn them down, just set accordingly.

Clifford used to make a universal key operated battery back up siren which will work with that system, any car security installer could fit that in about half an hour but will probably try and sell you a complete new system but to be honest it's not necessary.

[RedCarsGoFaster]

Good tip!

I was given to understand by the chap on the phone at HP that there was an electrical peculiarity to the early alarms that rendered them incompatible with other systems. I could perhaps make some useful progress towards learning whether this is the case or not by spending half an hour with a multimeter . . .

[Pride]

What area of the country do you reside, maybe I can suggest a good car security dealer in your area as I worked in the business for over 30 years???

[RedCarsGoFaster]

That would be most kind, thanks!

I live in Bristol. There are a couple of specialists nearby, but not quite the same breadth of choice as there might be further east.

[Pride]

That would be most kind, thanks!

I live in Bristol. There are a couple of specialists nearby, but not quite the same breadth of choice as there might be further east.

I've hopefully got some positive news about your H&P battery back up T1 siren tomorrow, so don't book it in with anyone just yet.

[RedCarsGoFaster]

I'm not in a tearing hurry to book it in somewhere - to me the immobiliser is the key part of the system and that is still working correctly, so it's mostly good!

Fixing the alarm is probably on the list for the new year, but if there's a way to way to restore functionality without an entirely new system I'd certainly be glad to hear it.

[Pride]

A positive PM just sent.

[RedCarsGoFaster]

Gratefully received - thank you!