turbo timer and alarm question...

[kuro]

hi all,

i installed my hks tt type 1 on the weekend.

at the moment i have a mongoose alarm,

now my problem is:

that when the timer is idling the car, i have to lock the doors manually and if someone tries to break in the alarm wont go off.

does anyone know how to trick the alarm to think that the engine is off so i can arm the alarm whilst the timer is still running?

thanks

kuro

[strutto]

You need to add a normally closed relay which is triggered when the turbo timer starts.

It should open the ignition sense circuit of the alarm.

So... when you switch the car on, the alarm can sense the ignition.

When you switch the car off, the turbo timer kicks in and opens the ignition sense circuit.

The alarm thinks the car is off but the timer is still running.

You can now arm your alarm with the engine running on turbo timer...

[Anquetil]

Originally posted by strutto

You need to add a normally closed relay which is triggered when the turbo timer starts.

It should open the ignition sense circuit of the alarm.

So... when you switch the car on, the alarm can sense the ignition.

When you switch the car off, the turbo timer kicks in and opens the ignition sense circuit.

The alarm thinks the car is off but the timer is still running.

You can now arm your alarm with the engine running on turbo timer...

Is this an easy job for any Auto Elec, I know I certainly have no idea how to do it? I have a similar problem to kuro, with a HKS TT & Black Widow alarm, its a pain having to wait around till the timer turns off.

[strutto]

Shane:

Yep... easy as. I did mine all myself and I am not a sparky... Mine is a HKS TT too so it can definitely be done.

This is how I had it explained to me...

the alarm senses ignition voltage to decide if it can arm.

the turbo timer supplies voltage to the ignition lead.

thus the alarm can't be armed with the timer activated.

install a normally closed relay in the alarm's voltage sense lead.

the relay is switched by the turbo timer's ignition lead.

when the timer comes on and supplies voltage to the ignition, the relay is opened.

the alarm ignition sense lead is isolated from the ignition lead.

thus the alarm is fooled into thinking the car is not running.

It is really simple. You need a normally closed or changeover relay. You will have a ignition sense wire going to your alarm. Cut it in half and connect it to pins 30 and 87 (or whichever pin is normally closed).

Your HKS TT will have a green and yellow wire coming out which usually join together at the 4-3pin adaptor.

Seperate the Yellow wire from the Green wire and join it to pin 86.

Pin 85 goes to ground..

Your mileage may differ... Specifications subject to change without notice...

[Anquetil]

Very helpful, thanks strutto!

[strutto]

np