Car alarm installed. Car wont start.

the guy pushed a button under my dash turned the key and car started

you need to know where that push button is under the dash

if you cant find it your self ... ring the place back for instructions

not nice but
you may have to get them to call out and show you or
tow the car back to where you got the battery fitted

the wire from the horn is part of an imobiliser so it wont start replace wire it sounds like imobiliser battery or alarm pad if wont turn off

I've ran into this problem myself, if you're not confident with doing some wiring you probably should not be doing this. This will probably take 1 to 3 hours to do this. If you can get a wiring diagram that showed how the alarm was originally installed. If not find the alarm probably underneath the dashboard, the alarm wires will problem be smaller than a wiring that is in your car. When removing the alarm think of it as this way, someone cut into the middle of your wiring harness and put a alarm in. Would you need to do is remove the alarm and splice the cut wires back together. Instead of removing the alarm all at once try disconnecting one wire in a time and finding its mate. The wires or color coded. For example, black with an orange tracer. This would mean it's a black wire with an orange line on it. If you're not sure look at a wiring diagram splicing the wrong wires together could cause your car not to function properly or damage it. Before you start this make sure you disconnect the battery also. Good luck.

If you do not have the remote control for the alarm (which can sometimes be purchased on ebay) You will have to uninstall the alarm.
The alarm is wired between the ignition coil wire coming from the ignition switch if the car is turning over and just wont start.
This can be complicated because of the amount of wiring, You have to cut the alarm wires out 1 at a time and match the cars wires back together.
I just did this for someone on a toyota recently and you really have to pay attention or put a peice of tape on each wire writing the color for example(white wire with rd stripe or white wire with red stripe ect.)
I hope this helps you,
Please rate me if this was helpful,
ETRONIC

I take it your alarm has remote start? If so, pull the panel above the drivers feet and look for where the yellow "start" wire has been cut and each end will be ran separately into your alarm. reattach both ends of the yellow wires.

something is obviously wrong with the wiring try reinstalling the old system and letting a n experienced mechanic install this other one for you wiring is everything

Sounds like you have a shorted wire causing a drain. I recommend disconnecting the alarm all together which should stop the short so battery can remain fully charged.

You probably need to put the key in the drivers side door and turn it like you were unlocking the car. The remote unlock will not work for this.

My guess is that you would have to get the users manual for your car alarm to change it's settings. There is a procedure that will allow you to use the passive arming so you can maually activate it or not. I have the viper, and this is how I set my alarm.

try checking your fuses and relays let me know if this doesnt work