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In this article, you will find information about the fuses of the Cadillac DeVille (model 1999), including diagrams of the fuse boxes, a list of fuses and relays, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in Cadillac DeVille
The wiring circuits in your vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Circuit breakers protect the power windows and other power accessories. When the current load is too heavy, the circuit breaker opens and closes, protecting the circuit until the problem is fixed or goes away.
Caution!
- Be sure you replace a bad fuse with a new one of the identical size and rating.
- Some add-on electrical equipment can keep other components from working as they should.
Location of Fuse Boxes
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.
MaxiFuses/Relay Center:
The MaxiFuses and relays are located next to the engine compartment fuse block on the driver’s side of the engine. To access the compartment fuse block, remove the shroud cover.
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.
The headlamp wiring has an individual fuse which is powered by a MaxiFuse. An electrical overload will cause the lamps to go on and off, or in some cases to remain off. If this happens, have the headlamp wiring checked right away.
The windshield wiper motor is powered by a MaxiFuse. If the motor overheats due to heavy snow, etc., the wipers will stop until the motor cools. If the overload is caused by some electrical problem, be sure to have it fixed.
Fuse Box Diagrams
1999
Underhood Fuse Block
| 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 LTR 1 | 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, Tum / 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 SEN 1 | Oxygen Sensor Front |
| OXY SEN2 | Oxygen Sensor Rear, Catalytic Converter (CAT) Rear Oxygen Sensor |
| A/C COMP RELAY | |
| FUEL PUMP RELAY | |
MaxiFuses/Relay Center
| Name | 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 |
| BATT3 | Steering Column Ignition Switch |
| BATT2 | 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 |
| ACCESSORY | Accessories |
| HEAD LPS | Headlamps |
| HORN | Horn |
| FOG LPS | Fog Lamps |
| DRL | Daytime Running Lamps (DRL) |
| HI/LO BEAM | High and Low-Beam Headlamps |
| INADVERT POWER RELAY | |
| IGN 1 RELAY | |
| STARTER RELAY | |
Rear Compartment Fuse Block
| 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, Tum/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 O-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) |