2010 T&C Does not start/crank
 

Suddenly my T&C started to play up.
For some reason it will not start, no cranking no nothing, just like there is some sort of start inhibit playing around.
I do have a couple of theories.
First of all, there is an aftermarket caralarm fitted, a VIPER 350HV togeter with an XPresskit OptimaX DLPK D2D Canbus interface, I would assume that if this alarm starts giving up (it has behaved very strange, sometimes enabling by itself) it would do some sort of startihibit.
Since it seems to be integrated with the CAN-bus, I assume thats how it inhibits the motor.

The two other things I can Think of is the Neutral Switch, but I cannot figure out in the servicedokumentation where it is located.
THe last possibble cause is the keylock itself, Same there, I cannot find it in the schematics, only the RKE-module is shown in the schematics.

Now, anyone that could help me out, and give some advise on this problem.