python 323, avital 4003, pkh34

your neutral safety wire is not listed as connected to anything.  It needs to see constant ground in order for the remote start to function.  Also, if the hoodpin switch is seeing ground, it will not allow the remote starter to function. Advanced

Thanks Yes, neutral safety wire is connected to the ground wire. Hood pin shows ~12V normally and 0V with hood open. Even though I didn't scrape paint under the bolt to make it well grounded. Is everything else where it should be?

double check there is not voltage on the brake wire at the remote start.   Disconnect the hoodpin briefly to make sure it's not seeing ground.   Double check your nss wire that it is seeing ground and if you wired the switch in series, make sure it is switched on.  If it's a transponder issue i believe the car will act like the ignition is on but not crank and flash the key light on the cluster.  How are you activating the remote start?  pulse your WHITE/ blue activation input wire to ground to make sure it isn't the output of your security system.Advanced

You're right, it's a Python that giving me problems. When I pulse-grounded WHITE/ blue,I heard all the relays clicking inside a RS box and car started. When I press a button on the remote I don't hear anything and nothing happens. So I probably have to program/activate remote starter feature on the alarm somehow, what do you think? It doesn't say anything about it in manual ( https://www.the12volt.com/installbay/forum_posts.asp?tid=126090&KW=viper3203 ). Also can't get bybass to work. Could you please check my wire legend? When I check D2D connection (4pin) shows RED / (+)12.75V; BLACK/ GROUND; BLUE (+)4.86V; GREEN (+)4.97V. So it does get power and has a ground at least - but shows no life at all. LED doesn't lit up or even blink when I am trying to activate or reset it. Thanks for helping me