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Vehicle Wiring Details for your
1998 -2004 Cadillac Seville Wiring Diagram
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Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 1998 -2004 Cadillac Seville . 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   Connect to BATTERY ONLY  
 STARTER  YELLOW (+)  IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  IGNITION SWITCH HARNESS
 IGNITION 2  WHITE (+)  IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+)  IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  BROWN/WHITE (-)  @ DIM, BLUG Plug, Pin B3 See NOTE *2
 PARKING LIGHTS ( + )  PURPLE (+) and BROWN/WHITE (+) Use both, See NOTE *1  @ FUSE BLOCK UNDER REAR SEAT
 POWER LOCK  RED/BLACK (Negative (-))  @ LOCK SWITCH in DRIVERS DOOR
 POWER UNLOCK  ORANGE/BLACK (Negative (-))  @ LOCK SWITCH in DRIVERS DOOR
 DOOR TRIGGER  See NOTE *3  @ DOOR MODULES
 DOMELIGHT SUPERVISION  GRAY (-), Requires #R30-H Relay  @ UNDER DASH LIGHT
 TRUNK RELEASE  LIGHT BLUE (-)  @ RIM, GRAY Plug, Pin B4, See NOTE *4
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ STEERING COLUMN HARNESS
 TACH  WHITE  @ PCM, BLUE plug Pin 23 See NOTE *5
 WAIT TO START LIGHT  N/A  
 BRAKE  WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   LIGHT GREEN (-)  @ DRIVERS DOOR MODULE in DRIVERS DOOR
 ANTI-THEFT  GM's PASSKEY 3 (PK3 on Steel Shaft of Ignition Key) TRANSPONDER SYSTEM  TRANSPONDER @ IGNITION SWITCH TUMBLER
 EXTRA INFORMATION
 NOTE *1 this vehicle uses a 2-Wire PARKING LIGHT Circuit, that will require 2 extra Relays Part #R30-H, to connect, See DIAGRAM. NOTE *2 at DIM Module located under the PASSENGER side of dash, near the BLOWER MOTOR. NOTE *3 the DRIVER DOOR wire is a TAN (-) at the DRIVERS DOOR module in the DRIVERS DOOR and all other doors use a DARK BLUE (-) at the DOOR Module in each door. When connecting to an Alarm System use all 4 wires and Diode Isolate. See DIAGRAM NOTE *4 the RIM Module is located behind the PASSENGER SIDE REAR SEAT, in the lower corner. NOTE *5 the PCM is located at the FRONT drivers side of engine compartment below the Air cleaner.


 
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