Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 1990 -1991 Ford Bronco . This information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle. Please be sure to test all of your wires with a digital multimeter before making any connections. More information on using a multimeter and testing wires please see our Technical Support Area.
PART
COLOR
LOCATION
12 VOLT
CONSTANT
YELLOW (+)
IGNITION SWITCH HARNESS
STARTER
RED/LIGHT BLUE (+)
IGNITION SWITCH HARNESS
STARTER
2
N/A
IGNITION
1
RED/LIGHT GREEN (+)
IGNITION SWITCH HARNESS
IGNITION
2
BLACK/GREEN (+)
IGNITION SWITCH HARNESS
IGNITION
3
N/A
ACCESSORY/HEATER
BLOWER 1
GRAY/YELLOW (+)
IGNITION SWITCH HARNESS
ACCESSORY/HEATER
BLOWER 2
N/A
KEYSENSE
N/A
PARKING
LIGHTS ( - )
N/A
PARKING
LIGHTS ( + )
BROWN (+)
@ HEADLIGHT SWITCH or in DRIVERS KICK PANEL
POWER LOCK
BLACK/ORANGE (5 Wire Reverse Polarity) See NOTE *1
IN PASSENGER KICK PANEL
POWER UNLOCK
PINK/GREEN (5 Wire Reverse Polarity) See NOTE *1
IN PASSENGER KICK PANEL
DOOR TRIGGER
BLACK/BLUE (+)
IN DRIVERS KICK PANEL
DOMELIGHT
SUPERVISION
USE DOOR TRIGGER, Requires Part #R30-H Relay
TRUNK RELEASE
N/A
SLIDING
POWER DOOR
N/A
HORN
DARK BLUE (-)
@ STEERING COLUMN HARNESS
TACH
TAN/YELLOW
@ IGNITION COIL
WAIT TO
START LIGHT
N/A
BRAKE
LIGHT GREEN (+)
@ SWITCH ABOVE BRAKE PEDAL
FACTORY
ALARM DISARM
N/A
ANTI-THEFT
N/A
EXTRA
INFORMATION
NOTE *1 For 5 Wire Reverse Polarity locks on this vehicle, you MUST use the DRIVERS DOOR SWITCH (MASTER SWITCH) when testing for 5 Wire Reverse Polarity Locks.
