i had 2 kill switch before and the one that is build in the multilock went bad so i just disconnect the cable and stop using that kill switch and ever since the car starts fine and i did get stuck a few times n bad weather all because the kill switch wasnt working righ. take it off disconnected and see if it start. i believe is the red cable that start the car so make sure you take off the kill switch cable that is between the red cable.