This is a UPDATED list with Tach wire inside vehicle near brake pedal.
2008 Ford F150 Remote Start Installation Instructions
Vehicle Battery Positive Wire (+): LightGREEN/ Violet (+)
Vehicle Battery Positive Wire Location: Ignition Switch Harness
Vehicle Ignition Wire (+): Blue/LightGreen
Vehicle Ignition Wire Location: Ignition Switch Harness
Vehicle Second Ignition Wire (+): N/A
Vehicle Second Ignition Wire Location: N/A
Vehicle Accessory Wire (+): BLACK/ LightGreen
Vehicle Accessory Wire Location: Ignition Switch Harness
Vehicle Second Accessory Wire (+): N/A
Vehicle Second Accessory Wire Location: N/A
Automobile Engine Starter Wire (+): RED / LightBlue
Automobile Engine Starter Wire Location: Ignition Switch Harness
Automobile Second Engine Starter Wire (-): N/A
Automobile Second Engine Starter Wire Location: N/A
Factory Anti-Theft System: Ford PATS or Securilock Vehicle Immobilizer
Factory Anti-Theft System Type: Key Sends a Signal to the BCM Module
transponder is
tx-WHITE/ green
rx-grey/orange
both are in the harness with the ignition wires
if those colors aren't present, violet/grey and yellow/red are TX/RX respectively
Crankshaft Sensor Wire:Crankshaft Sensor GRAY (-)
Crankshaft Sensor Wire Location: AT PCM MODULE ON PASSENGER SIDE OF FIREWALL NEAR BATTERY
Camshaft Sensor Wire: Crankshaft Sensor GRAY (-)
Camshaft Sensor Wire Location: AT PCM MODULE ON PASSENGER SIDE OF FIREWALL NEAR BATTERY
Car Key Sense Wire (-): BLACK/ Pink Car Key Sense Wire Location: Steering Column Harness
Car Neutral Safety Wire (+): Pink/Light Green
Car Neutral Safety Wire Location: At PCM Module on Passenger Side of the Firewall Near the Battery
Car Tachometer Wire (-): Blue
Car Tachometer Wire Location: At Harness Next to the Brake Pedal
Otherwise any odd colored wire at fuel injector (NOT RED)
Car Parking Lights Wire (+): Brown
Car Parking Lights Wire Location: At Headlight Switch
Car Brake Lights Wire (+): Green
Car Brake Lights Wire Location: At Switch Above the Brake Pedal
Car Horn Wire (-): Dark Blue
Car Horn Wire Location: At Steering Column Harness
Disarm Defeat : 5 wire
Car Wire Location : Left Rear, Harness to Rear
Power Unlock Wire (-): Pink/Green
Car Unlock Wire Location :AT BCM MODULE BEHIND TRIM IN REAR OF CAB ON DRIVERS SIDE (*) Also available in lower drivers kick harness to rear.
Power Lock wire (-): Pink / YELLOW
Car Lock Wire location: AT BCM MODULE BEHIND TRIM IN REAR OF CAB ON DRIVERS SIDE (*) Also available in lower drivers kick harness to rear