Alarm: two flashes, one beep

[por986]

Hi,

'01 S 46Kmiles

I disconnected my battery to work on my stereo - I have done this in the past to work on speakers, but this time I replaced the head unit and installed a new amp (removing the HAES).

After reconnecting the battery, all seemed normal until I sst the alarm. Everytime I set it by pressing the lock button on my key, the parking/signal lights blink twice (as normal), but after about 1.5 seconds, the horn beeps once and the intertior light comes on for about 2 seconds then dims out. It behaves like I was setting it to bypass the interior sensor by pressing the lock 2x.

I checked the center console, it is closed. I verified that all doors, hood, trunk, are all closed. No water under the seats (never as far as I know), bone dry.

Any ideas what might be going on?

Thanks!

[Tool Pants]

Look on the left side of the oem radio and you will see a plastic insulator for the alarm contact. Your aftermarket radio does not have this insulator, so you now get a single beep when you se the alarm. Put a piece of tape on your new radio in the same area, or disconnect the wire to the alarm contact.

Don't know about the light thing.

[kbrandsma]

Hi,

'01 S 46Kmiles

I disconnected my battery to work on my stereo - I have done this in the past to work on speakers, but this time I replaced the head unit and installed a new amp (removing the HAES).

After reconnecting the battery, all seemed normal until I sst the alarm. Everytime I set it by pressing the lock button on my key, the parking/signal lights blink twice (as normal), but after about 1.5 seconds, the horn beeps once and the intertior light comes on for about 2 seconds then dims out. It behaves like I was setting it to bypass the interior sensor by pressing the lock 2x.

I checked the center console, it is closed. I verified that all doors, hood, trunk, are all closed. No water under the seats (never as far as I know), bone dry.

Any ideas what might be going on?

Thanks!

There is a contact inside the radio console. If it lost connection it will cause the alarm to behave in this fashion. When you removed and replaced the HU did you replace this contact?

__

[por986]

Thanks guys for the fast response.

ToolPants,

I will try your suggestion tomorrow, thanks!

kbrandsma,

Are you talking about the same thing as ToolPants, or is there some other contact?

Also, does this effect the security or the "system" negatively? If I do nothing, is it something that I can safely ignore?

[Tool Pants]

If you pull the head unit out and look to the left you will see the alarm contact. In my first picture you can see the dent the contact left in the plastic insulator.

With the oem radio the alarm contact cannot ground to the metal body of the radio because of the plastic insulator. But if someone tried to pull the radio out with the alarm on, the contact would touch the metal body of the radio and the alarm would go off.

So, you put a small piece of tape on your aftermarket radio in the area where the insulator would be. Needs to be sticky and thick or the tape will peel off or the contact will slice it when you slide the radio back in. That is the black tape in the picture of a TrafficPro. 2 layers of tape were used.

Or, you disconnect the wire to the contact and tape the end of the wire so it cannot touch anything metal.

Or, you leave it the way it is. The alarm still works and everything except the radio is protected. Some people like the single beep to tell them the alarm has been set.

[vncool]

Hi, I had this problem with two flash and one beep..I will try to reinstall the deck but which wire am I support to discon and where?

Thanks in advance