3 replies to this topic

[nodge]

Hi guys,

I have a Mongoose alarm fitted to my car. My paperwork is at home but from memory it is an M80.

In the past month it has started going off from time to time when i turn the engine on...
- the car is unlocked (alarm disarmed)
- turn key to accessories ok
- as soon as i start engine the siren will sound.
- engine still runs. In fact I can drive the car around with the siren going so it isnt imobilised

I have noticed it happens more often than not when the car is park outside, and being summer in QLD I relate this to heat... no problems the past few days when it has been overcast and raining but today with the sun out again it went off when i started the engine.

The alarm does not sound on its own while left outside in the heat - only when engine is running.

A solution I found at the start was to turn the car off, get out, lock the doors and come back 15 mins later. Starting the engine again was fine with no alarm going off and I could drive for however far i wanted with no problems.

Today when it went off I came back 15 mins later - started engine and siren went off. Left it another 15 mins - same. 30 mins - same. 2 hours - same. 1 hour again - same. And now I'm here. Lucky i don't have to be anywhere urgent but its a bit of a pain and I obviously don't want to drive it to the auto electrician with the siren going off.

Any ideas on what might be the trigger of this and a solution?

Has anyone had this problem before?

Cheers, Nodge.

[rathies]

does the alarm go off as soon as you start the car or a short time after? Also if you get out of the car, lock it, unlock it and try again a few times without waiting 15 mins or so does it go away?

When the car is running and the alarm is sounding:
-does the dash led flash or is it constantly on or off?
-can you lock and unlock the doors with the remote?
-Do the Indicators flash?

If its happening as soon as you start the car it could be a poor earth that is isolating (through a relay) when you start the car. Perhaps try running a separate ground wire to the alarm box and see what happens.

Edited by rathies, 23 January 2012 - 05:53 PM.

[icacha]

mongoose in qld. call them. find out which installer is close to you. make appointment to get it fixed.

[Carbon Car Systems]

Sounds like its loosing power or earth to the siren when the car is started, check the earth on the siren in engine bay (often where its screwed in there is a ring terminal).

Kind Regards,
Daniel Gardener
Carbon Car Systems