Whichever one that reads 12v only when the car is on. Get the DMM out and start searching!Unless you have a diagram or something, ideally you'd want the wire that goes straight to the ignition.
that is the wire i am trying to find
i got all this for my car so..... i think brown,yellow,or light green are the ones but i guess i will have to check to see witch one comes on with the car and shuts off when i cut the car off correct? you do not want a constant power going to it at all times?
2000 Mercury Grand Marquis Alarm, Remote Starter, Keyless Entry Wiring Information
Constant 12V+ Brown or Yellow or Light Green Ignition Switch Harness
Starter White/Pink Ignition Switch Harness
Ignition Brown/Pink Ignition Switch Harness
Ignition 2 Gray/Yellow Ignition Switch Harness
Ignition 3 Pink/Brown Ignition Switch Harness
Accessory Black/Light Green Ignition Switch Harness (AC/RUN)
Tach Light Green/White PCM Pin 26
Neutral Safety Wire Not Grounding OEM Switch opens Starter Circuit
Brake Switch Light Green Brake Switch or 16 Pin Connector Driver's Kick
Trunk Release Purple/Yellow (+) 3 Pin Connector Driver's Kick Panel
Trunk Pin Brown/White (+) Light in Trunk
Parking Lights Brown (+) Light Switch or Driver's Kick Panel Black Connector
Head Lamp Red/Yellow (+) Passenger's Side of Steering Column Light Module
Factory Disarm Green/Purple (-) Driver's Door Boot
Door Trigger Black/Light Blue (+) Light under Dash
Door Lock Pink/Yellow W/Keyless Positive Trigger Driver's Boot
Door Unlock Pink/Light Green W/o Keyless Entry Reverse Polarity
Driver's Lock Pink/Black (+) Dark Door Jamb Boot
Driver's Unlock Red/Orange (+) In Driver's Door
Passenger Unlock Pink/Orange (+) Dark Door Jamb Boot
Horn Wire Dark Blue (-) Steering Column
Windows Up LF=Yellow, RF=White/Yellow, LR=Gray/Orange, RR=Red/Black
Windows Down LF=White/Black, RF=Tan/Light Blue, LR=Yellow/Blue, RR=Yellow/Black