Here's a tech sheet.
FORD
MODEL YEAR(S)
EXPLORER 2004 -2005
KEY T-HARNESS IMMOBILIZER
FD KEY-4 FD-3 FORD'S SECURILOCK ANTI-THEFT TRANSPONDER SYSTEM, Requires 791 and Extra Ignition Key
PART COLOR LOCATION DIAGRAM
12 VOLT CONSTANT YELLOW (+) IGNITION SWITCH HARNESS, BLACK Plug
STARTER RED (+) IGNITION SWITCH HARNESS, BLACK Plug
STARTER 2 N/A
IGNITION 1 RED/LIGHT GREEN (+) IGNITION SWITCH HARNESS, BLACK Plug
IGNITION 2 N/A
IGNITION 3 N/A
ACCESSORY/HEATER BLOWER 1 DARK GREEN/LIGHT GREEN (+) IGNITION SWITCH HARNESS, BLACK Plug
ACCESSORY/HEATER BLOWER 2 N/A
KEYSENSE N/A
PARKING LIGHTS ( - ) N/A
PARKING LIGHTS ( + ) BROWN (+) @ HEADLIGHT SWITCH, GRAY Plug
POWER LOCK PINK/YELLOW (TYPE B) IN DRIVERS KICK PANEL, LARGER of the 2 Harnesses, heading to REAR of Vehicle
POWER UNLOCK PINK/LIGHT GREEN (TYPE B) See NOTE *1 IN DRIVERS KICK PANEL, LARGER of the 2 Harnesses, heading to the REAR of Vehicle 18001_EXPLORER_FORD'S GEM WAKE UP DIAGRAM.pdf
LOCK MOTOR WIRE PINK/BLACK (+) IN DRIVERS KICK PANEL, LARGER of the 2 Harnesses, heading to the REAR of Vehicle
DOOR TRIGGER BLACK/LIGHT BLUE (+) IN DRIVERS KICK PANEL, LARGER of the 2 Harnesses, heading to the REAR of Vehicle
DOMELIGHT SUPERVISION USE DOOR TRIGGER, Requires Part #775 Relay
TRUNK RELEASE ORANGE/LIGHT GREEN (+) or PURPLE/YELLOW (+), Requires Part #775 Relay IN REAR HATCH HARNESS
SLIDING POWER DOOR N/A
HORN YELLOW/LIGHT GREEN (-) or YELLOW/LIGHT BLUE (-) @ STEERING COLUMN, LARGE BLACK HARNESS, in SPLIT LOOM COVERING
TACH Any wire that is NOT WHITE/PURPLE or RED @ IGNITION COIL PACK
WAIT TO START LIGHT N/A
BRAKE TAN/BLACK (+) or LIGHT GREEN (+) @ SWITCH ABOVE BRAKE PEDAL
FACTORY ALARM DISARM N/A
ANTI-THEFT FORD'S SECURILOCK ANTI-THEFT TRANSPONDER SYSTEM TRANSPONDER @ IGNITION SWITCH TUMBLER
NOTES
NOTE *1 On some vehicle with FACTORY ALARM or KEYLESS ENTRY, after the vehicle sets for a few minutes, if you cannot UNLOCK the door with the AFTERMARKET remote control it will be necessary to WAKE UP the GEM Module. See DIAGRAM under DOOR UNLOCK, GEM WAKE UP DIAGRAM. IF the vehicle DOES NOT HAVE a FACTORY KEYLESS ENTRY or FACTORY ALARM it is a TYPE C Door Locking System.