Alarm Question!

[groonsnout]

G'day All,

I've just fitted a pretty flash alarm to my S1 RS4 stagea with remote start etc.. and it all works great EXCEPT the alarm requires a source to splice into which provides 12V once the engine is running to stop the ignition sequence. The obvious source was the alternator so I wired it into there, but the alternator provides voltage so quickly that it only gets the chance to turn over about twice before cutting the starter. This works great when the engine is warm, but when cold, or has been sitting, it requires a couple of extra turns to get firing and the alarm kills the starter before it's fully kicked over.

So which wire would give 12V when the engine is fully up and going? The manual suggests wrapping it around the coil (or coil pack I guess) but that seems messy. I assume there would be a signal wire coming back from a relay somewhere under the bonet? A charging regulator? Any ideas at all?

or is there any way of putting something in line like a big capacitor or similar from the alternator to delay the power through the wire?

Sorry, I'm far from an electrical guru!

Thanks for any help

[Chris Rogers]

so what EXACTLY are you asking? sounds like you bought a EBAY special with remote start and want to set that bit up. (illegal btw.)

[groonsnout]

so what EXACTLY are you asking? sounds like you bought a EBAY special with remote start and want to set that bit up. (illegal btw.)

yep and it's all hooked up, and like I mentioned, the remote start works great except it turns off too quickly as the alternator provides 12v just from being turned over by the starter - all remote start alarms require a 12V signal from the engine while running to stop the starting sequence, so I'm just wondering what wires in the car might provide 12V only when the engine is running?

Cheers,

Michael

[MAD R32 GTR !]

yo!

Try pick up 12V at the fuel pump supply wire

Should only have 12V when running

[groonsnout]

yo!

Try pick up 12V at the fuel pump supply wire

Should only have 12V when running

thought about that! Except doesn't the pump get 12V when the ignition is fired (or just put the ignition ON) as it primes/pressureises the system?

[WhitePrincess]

dude, in some alarms with remote start i've seen that the wire connects to RPM wire of your CPU, but can't tell you for sure as I have never measured what's coming out of it when engine is about to start or running.

So give your RPM/REVS wire a go, let me know how it goes good luck.

[groonsnout]

dude, in some alarms with remote start i've seen that the wire connects to RPM wire of your CPU, but can't tell you for sure as I have never measured what's coming out of it when engine is about to start or running.

So give your RPM/REVS wire a go, let me know how it goes good luck.

thanks mate - you're a champ, as far as I'm aware, stagea's use slightly different pin-outs than a R33 but it shouldn't be too hard to figure out!

[GTRBOYZ]

The reason your car is not cranking over is depend on a few things.

1. Does your car alarm have a smart senser that know when the engine is running. For example. It will to start your car the 1st go for 1 sec then stop. 2nd try maybe 2sec and 3rd try 3 sec and so on until car start.

2. Does your alarm have the timer on the cranking time that can be program to allow longer crankiing time...how long does the alarm give power to the starter wire.

3.The wire that told you to wrap around the coil is the signal wire that the alarm is reading off to see if the engine is running or not. Some alarm use the Rev tacho.

By the way the 12V at your key barrel is fine. It the alarm that not giving longer cranking signal due to you did not hook up that wire around the coil.

\good luck