2013 focus falsing

2013 focus hatchback. installed avital pager alarm n used dome supervision wire instead of latch wires because of n/c door triggers and messy tech doc of using diodes n resistors for each door input. done it this way on super duty trucks n works fine w no false. and DEI said better to use dome wire cuz of possible current draw using the tech doc. but still falses every half hour.i tried diodes n relay on dome super wire but did not work. soo gonna order viper n change program input of door trigger wire to accept n/c. but next install on a focus any other ideas?? thnx in advance

Keep the dome supervision, so much easier and run a 10k resistor from the green dome feed to your power supply. On up 2010 UK Focus (Foci?) we ran to the dome light and put diodes on the POS feeds to each courtesy (dome) light, car and trunk.