Alam light stays on

You need to replace your alarm siren. The light is on to show you that the back-up battery inside the siren does not work like it should. There is a small charger for that battery inside the siren unit. But the battery tend to leak acid onto the green print plate, so the charger does not work properly. I would get a new original siren so you still have the original beep sound when you arm/disarm and when the alarm goes off. Cost about 2-300 dollars.

 

You can cut open the oem siren and replace the battery if the old battery did not leak acid that eats the circuit board.

Personally, I let the light be red. The imobilo and flashing lights still work. The siren will just not work as designed. In my car I hate the siren so I have mine disconnected.

 

Just to be clear, the Corvette alarm on the Maranello chirps when you arm and disarm and the lights flash. However if the alarm has been set off, there is no siren noise, just the lights will flash.
On a Corvette the same alarm when set off does sound. Have not yet read why it doesn’t work the same on a Ferrari.
It does kill the dash light.
Bill
FL

 

Interesting Bill. There is supposed to be a vette siren that is plug and play or change the connector and play??? It is supposed to be from a 97-04' vette? AKA...seriesC5. I race the Z06 version of the C5 but mine never had an alarm. I think they wanted the Z06 to be as light as possible hence the lame interior and flimsy seats but the Z06 with carbon fiber hood was around 3100lbs. Pretty darn good for its day.

 

FBB, the Corvette alarm I'm familiar with is from the C6. Installed one in the 575 in either 2011 or '12 and still functions normally with exception notated above. It was plug and play. Priced currently online at $71.51. Believe the current GM part number of 15213135 might be a superseded part number to the one I installed.
Current part number shows to fit 2005-13 Vette, and 2010 to 2015 Cadillac CTS. Did a brief search for a C5 alarm and did not find a current listing.
Have had a C6Z since 2006 and still love the car. They started at a listed weight of 3132 and gained weight every year after that. Some owners complained they wanted more luxuries and they eventually got them.
Bill
FL

 

Just replaced my dead siren with a Corvette siren GM part number 15213135 ($86 delivered). No need to modify the connection. It beeped once immediately after connection even with the main battery switch turned off. It beeps 4 times when armed and twice when disarmed. It also beeped continuously when alarm is triggered while armed. More importantly, no more constant red light after ignition. Seems like it works exactly like the original siren. While the headlight was out, I replaced the headlight rubber gasket.

New GM Siren
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Original dead siren
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While taking out the headlight, I damaged one of the little rubber U tubes connected to the right light housing. I could probably just glue it, but prefer to install a new one if available. Can't find it on Recambi Table 127. Any idea where I can find one of those?

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Root good to hear that everything works with the Chevy alarm. Have heard over the years that different cars can have different results. I wonder in this case if it's a difference in the 550 vs 575... or just different results showing up randomly?

Re the headlight vent hose. I'd be shocked if Ferrari sold that separately. Think you'd be better off contacting a Ferrari recycler and pleading with them to take one off a damaged headlight assembly. Suspect that piece is likely used on all types of Fcars. You may need to send a picture with that part highlighted. Ferrparts is where I'd start but there are several.
Bill
FL

 

The alarm is wired around the battery cut-out switch, which is why you get noise even with the switch turned off.

 

Atrophic or hypertrophic?

 

Good fix!

 

Thanks Sark. Pm sent.

 

Epoxy Structural Adhesive, J-B Weld 8265-S, 2 oz. Tube

 

Just picked up a GM Siren, let see if she works....
As I presently have the red light staring at me during my drive, although the alarm itself functions quite well.
Thanks for all the assistance guys

 

I probably bought the wrong one, but the GM alarm I ordered for my 550 has a different harness connector arrangement.
~Troyce

 

[QUOTE="Troyce. Would you post the GM part number you purchased.[/QUOTE]

I don't have that number at hand because it was so long ago when I got it, and now the part is installed - just not connected. I will try to find it.

However - check this: https://www.amazon.com/VARTA-REPLACEMENT-BATTERY-55615303059-150MAH/dp/B078JFVLPN
Check the image of my battery siren circuit board herein. The noted replacement from Amazon has a different solder-pin config, but that doesn't appear to be an issue as the batteries have a large +/- surface plane on either side. Some de-soldering/re-soldering involved, obviously.


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Troyce the number that I used and Root posted that he had used plugged in just fine. GM 15213135. If that’s the number you ordered you might check your alarm with Root’s pic above of the GM alarm and see if numbers match.
Ironically my GM alarm is timing out and in need of replacement just in the last few days.
Also if I remember correctly it seems somewhere on these GM alarms there is a born on date. It might be worth noting before installation.
Bill
FL

 

I have a 152131135 that I bought years ago as a spare but you guys who don't have one might check this out

It's GM Parts Center and they only have one left

https://www.ebay.com/itm/GM-OEM-Anti-Theft-Alarm-15213135-/132047708342