Hello all,

Well I installed an Astra 777 2-way paging alarm in my car. Everything is working fine except I am having problems getting the starter/ignition disable to work.

I purchased a 30/40 amp relay, extra wiring harness for wires under the hood and set everything up according to this site.

http://causeforalarm.thecarthing.com...ill/index.html

It is under ignition kill.

I tested the relay and the disable works as it should. When I ground the trigger point to the chassis or the negative post on the battery the car will turn over, but not start. However, when I use the negative output wire on my alarm, and arm it, the ignition is not disabled and the car will start. I am using the correct wire from the alarm, I double checked the manual. It's the orange wire with a negative output while armed.

I am stuck. My theory is that the ground output from the alarm is not strong enough to activate the relay. The manual for the alarm says it's a (-) 500mA. When I put a volt meter to the alarm output and the positive battery terminal and arm the alarm, I see around 11.5 volts. When the alarm is unarmed I see no voltage. This tells me that the output is working properly and it's strong enough to create that much voltage, why wouldn't it activate the relay.....

Help would be appreciated.

Thanks

 

OK, orange is connected to one side of relays coil, [#85 or #86] what have you connected to the other side??? 94

 

I connected orange to 86....Just as it shows.



The relay works. When I ground 86, the car won't start, just as it should. But when I use the orange wire from the alarm, it starts. I tested the orange wire to make sure it is grounding while armed, and it is....... I just don't know if the ground is enough to activate the relay. You would think it would be, considering the alarm is designed to work with standard universal automotive relays.

Also, as a side note: When I installed the alarm I used a separate grounding point to the chassis. I didn't want it sharing a ground with the other devices like my lock module, and backup battery. So the alarm itself should have a great ground.

I am out of idea's......

 

Look again, orange is connected to #85, although it makes no differance if orange is on #85 or #86 as long as there is 12V+ on the other one, and if disconnecting the orange from whichever one its on and grounding the terminal energizes, [turns on] the relay then the problem has to be the alarm, can the orange leads output be programed for both NO, [normally open] and NC, [normally closed]?

Can you move #87a to #87 on relay and see what happens? 94

 

I meant 86.....dang typo's...

Either way, I believe it is the alarm. If I ground 86 the ignition is disabled as it should. In theory, the alarm should provide a ground for 86 when armed also. I am going to go through the alarm manual some more. The AC & AO options could be in there, and I believe that could be worth looking into.

That is why I am so stumped. I tested the orange wire with a volt meter. When I placed one lead on the + terminal and the other on the orange wire, there was no voltage while the alarm was unarmed. Once I armed it I saw
11.56 volts on the meter. This tells me the alarm is providing a ground while armed.

I will double check everything and post back. Thanks for all your help.

 

Use continuity setting on meter to test the orange lead, not voltage, on voltage a .005mA output will still show 11.56 volts and the relay needs about 250mA to energize and about 125mA to stay energized, the output on the orange lead should be 500mA.

set meter to continuity and place one probe on the neg.(-) batt terminal or chassis ground and the other on the orange lead, [disconnect the orange from the relay. 94

 

I actually did that also. There was no continuity between the orange and ground. I thought that was strange. I thought that it should beep, because any ground on the chassis or negative terminal should have continuity with each other. So what now? Does that mean that the alarm is not grounded enough? Not working properly? or what?

Thanks for all your help!

 

It means the orange, [ground out when armed] is not working, return the alarm for replacement from where you got it. 94

 

That sux....... I will test it some more to be sure.

Thanks