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Cadillac DeVille (1999) Fuse Box Diagram

avatar Jonathan Yarden Mar 25, 2021 · 5 min. read

In this article you will find a description of fuses and relays Cadillac, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.

Year of production: 1999

Maxi Fuses/Relay Center

The MaxiFuses and relays are located next to the engine compartment fuse block on the driver’s side of the engine.

Cadillac DeVille - fuse box diagram - maxi fuses/relay center

MaxiFuse (8-Way) Usage
BODY 1 Road Sensing Suspension (RSS) Fuse (DeVille Concours Only), Convenience Fuse, BATT Fuse, Antenna Fuse, Right and Left Position Lamp Relays (Export), Hazard/Position Lamp Cut-Out Relay (Export), Trunk and Fuel Door Release Solenoids and Relays, Door Lock/Unlock Relays, Damper Relay (DeVille Concours Only), Parking Lamp Relay, Right and Left Park Fuse
BODY 2 Defog Relay, Pull-Down Fuse, Right and Left Heated Seat Fuse, Electronic Level Control (ELC) Fuse/Relay, Heated Mirror Fuse, Heated Backlite Fuse, ELC Circuit Breaker
BODY 3 Controlled Power Relay, Controlled Power Back-Up Relay, Cluster Fuse, Passenger Zone Module (PZM) Fuse, Radio Fuse, Delayed Accessory Bus (DAB) Relay, Trunk and Fuel Door Release Relay, High Beam Relay, Comfort Fuse, AMP (Bose Only) Fuse
INADVERT Inadvertent Power Relay, Interior Lamps Fuse, Cigarette Lighter-1 Fuse, Cigarette Lighter-2 Fuse, Courtesy Lamp Relay
LAMPS Headlamps Fuse/Relay, High/Low Beam Control Relay, Fog Lamp Fuse (DeVille Concours Only), Hazard Fuse, Mirror Fuse, Inadvertent Power Relay, Right and Left High Beam Fuse, Right and Left Low Beam Fuse, Stop Fuse, Fog Lamp Relay (DeVille Concours Only), DRL Relay, DRL Fuse
IGN 1 Rear Ignition-1 Relay, Wiper Fuse, Relay Ignition-1 Fuse, Supplemental Inflatable Restraint (SIR) Fuse, Accessory Relay
WINDOWS Delayed Accessory Bus (DAB) Relay
SEATS Horn Relay, Driver and Passenger Lumbar In/Out Relays, Driver and Passenger Lumbar Up/Down Relays


MaxiFuse (6-Way) Usage
BATT 3 Steering Column Ignition Switch
BATT 2 Steering Column Ignition Switch
IGN 1 Front Ignition-1 Relay, Oxygen Sensor 1 and 2 Fuse, Fuel Fuse, Cruise Fuse, Fuel Pump Relay
BATT 1 Starter Relay and Solenoid, Park/Rev Fuse, Park Relay, Powertrain Control Module (PCM) Fuse, AC Compressor Fuse and Relay, Cooling Fan Relays, Reverse Relay
BRAKES Anti-Lock Brake System (ABS) Brake Modulator
COOL FNS Cooling Fan Relays 1 and 3


Power Distribution Block Usage
ACCESSORY Accessories
HEAD LPS Headlamps
FOG LPS Fog Lamps
DRL Daytime Running Lamps (DRL)
HI/LO BEAM High and Low-Beam Headlamps



Fuses and Circuit Breakers

Underhood Fuse Block

The underhood fuse block is located next to the engine air cleaner/filter on the driver’s side of the engine. Lift the cover to gain access.

Cadillac DeVille mk7 - fuse box - engine compartment

Fuse Usage
DRL Daytime Running Lamps (DRL)
CNR LPS Cornering Lamp Switch, Right and Left Cornering Lamps, Right and Left Position Lamp Relays (Export)
INT LPS Trunk Lamp, Courtesy Lamps, Front Vanity Lamps, Glove Box Lamp, Garage Door Opener, Courtesy Lamp Relay, Front Reading Lamps, Rear Vanity Lamps and Reading Lamps (DeVille Concours/d’Elegance Only)
CIG LTR1 Front Cigarette Lighter, Rear Cigarette Lighter (DeVille Concours Only)
CIG LTR 2 Right and Left Rear Cigarette Lighters
L HDLP LO Left Low-Beam Headlamp
R HDLP LO Right Low-Beam Headlamp
L HDLP HI Left High-Beam Headlamp
R HDLP HI Right High-Beam Headlamp
FOG Fog Lamp Relay (DeVille Concours Only), Right and Left Fog Lamps (DeVille Concours Only)
HDLPS Headlamp Relay, High/Low Beam Control Relay, Right and Left Low/High Beam Fuses
HAZARD Electronic Flasher Module, Turn/Hazard Switch, Right and Left Front Turn Lamps, Right and Left Rear Turn Lamps, Right and Left Repeater Lamps (Export), Cluster
STOP Stoplamp Switch, Turn Hazard Switch, Anti-Lock Brake System (ABS) Controller, Stepper Motor Cruise Control, Right and Left Rear Stoplamps (Export), Center High-Mounted Stoplamp
MIRROR Inadvertent Power Relay, Left Outside Rearview Mirror Switch, ALDL, Memory Mirror Module (Optional), Dimmer Switch, Cluster
DRL Daytime Running Lamp (DRL) Relay, Left and Right Low Beam in DRL Mode, DRL Resistor
IGN 0 (ENG) Powertrain Control Module (PCM)
SPARE Not Used
ABS Anti-Lock Brake System (ABS)/Traction Control System
IGN-1 Rear Ignition-1 Relay, Fog Lamp Relay (DeVille Concours Only), Controlled Power Backup Relay, DRL Relay, Ignition Switch in Steering Column, Injectors, ECS Fuse, PCM Fuse, DIS Fuse, Injector Fuses
WIPERS Accessory Relay, Wiper Switch
A/C COMP AC Compressor Relay, Cooling Fan Relays 1, 2, 3, Compressor Clutch
PCM (BAT) Powertrain Control Module (PCM)
PARK/REV Reverse Relay, Right and Left Back-Up Lamps, Electrochromic Mirror (in Header), Park Relay, Brake Transaxle-Shift Interlock (BTSI) Switch, BTSI
ECS Transaxle Shift Solenoids, Mass Airflow, Canister Purge, PCM, Linear Exhaust Gas Recirculation (EGR), Front Ignition-1 Relay
PCM (IGN) Powertrain Control Module (PCM)
DIS Electronic Ignition Control Module
CRUISE Stepper Motor Cruise Control, Power Steering Pressure Switch, Low Refrigerant Pressure Cutoff Switch, Park Relay
INJ Injectors 1, 4, 6, 7
INJ Injectors 2, 3, 5, 8
FUEL PUMP PCM, Fuel Pump Relay, Fuel Pump
OXY SEN1 Oxygen Sensor Front
OXY SEN2 Oxygen Sensor Rear, Catalytic Converter (CAT) Rear Oxygen Sensor


Rear Compartment Fuse Block

This fuse block is located on the front wall of the trunk (behind the rear seat) on the driver’s side. Loosen the four trunk trim fasteners and pull the trim away from the fuse block to gain access.

Cadillac DeVille mk7 - fuse box - rear compartment

Fuse Usage
RLY IGN1 Cluster, Cruise in Stalk, Passenger Zone Module (PZM), Traction Control (TCC) Switches
SIR Sensing and Diagnostic Module (SDM), Right and Left Side Impact Sensing Modules
ELC Electronic Level Control (ELC) Relay, ELC Sensor (DeVille Only), ELC Compressor
TURN Electronic Flasher, Turn/Hazard Switch
CONSOLE Rear Zone Blower, Right and Left Heated Seat Switches (Optional), Cellular Phone Handset (Optional)
SPARE Not Used
SPARE Not Used
RSS Road Sensing Suspension (RSS) (DeVille Concours Only)
IGN 0-BODY PRNDL Indicator (DeVille Concours Only), PZM, Cluster, Air Control Module (ACM), Upper Zone Motor, Lower Zone Motor (Optional), HVAC Solenoids, Climate Control Panel Analog Cluster (Console Shift Only), Rear Defog Relay, ELC Relay (DeVille Concours Only), Dual Zone Switch (DeVille and DeVille d’Elegance Only)
COMFORT CD Player, Remote Keyless Entry (RKE), Controlled Power Relay, Air Control Module (ACM), PZM
AMP Active Audio Amplifier (Optional)
PZM Passenger Zone Module (PZM)
RADIO/PHONE Radio Receiver, Phone, DAB Relay, Trunk Release Relay, Fuel Door Release Relay, High/Low Beam Relay
CLUSTER Steering Wheel Controls, Cluster
ACC PZM, Electrochromic Mirror, Rain Sensor (Optional), Accessory Relay
HTD BACKLT Rear Window Defog
HTD MIR Right and Left Heated Outside Mirrors
HTD SEAT R Passenger Heated Seat Relay (Optional)
HTD SEAT L Driver Heated Seat Relay (Optional)
PULL DOWN Trunk Pull-Down Motor
HDLP WASH Headlamp Washer
ANTENNA Power Mast Antenna
RSS Road Sensing Suspension Module (DeVille Concours Only), Damper Relay (DeVille Concours Only)
CONVENC Trunk Release Relay, Trunk Release Solenoid, Fuel Door Release Relay, Fuel Filler Door Release Solenoid, Door Lock Relay, Left Front Door Motors, PZM, Door Unlock Relay
BATT Driver and Passenger Seat Lumbar Switch (Optional), Memory Seat Module (Optional)
RSS Road Sensing Suspension (DeVille Concours Only)
RT PARK Headlamp Switch, Right Turn/Stop/Tail Lamps, Right Front and Rear Sidemarker Lamps, Right Front Park/Turn Lamps, License Plate Lamp, Hazard/Position Lamp Cut-Out Relay (Export)
LT PARK Left Turn/Stop/Tail Lamps, Left Front and Rear Sidemarker Lamps, Hazard/Position Lamp Cut-Out Relay (Export), Left Front Park/Turn Lamps, Underhood Lamp, Trailer (Optional)

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

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