basic wiring remote start

Ignition wire. If I use a DMM When should I have 12V on my Ignition wire? Only on Run and Start position? Accesory wire on ingnition switch. If I use a DMM When should I have 12V(+) on my accesory wire? On run and start position? How can know the diference of Igniton wire and accesoty wire? Does acc. wire interrupts at start position then go back to 12V(+)? Starter wire. If using a DMM should I have 12V(+) only while starting car?ok let't start. (+) is positive (-) is negative.

Acc will normally drop to 0 volts while turning the key over. Ignition will normally drop to 10 volts or so while turning the key over. Starter will only show 12 volts while turning the key then drop out to 0 volts while car is running.