The Cadillac Escalade GMT 400, produced from 1998 to 2000, was an early iteration of the luxury SUV known for its robust performance, spacious interior, and advanced features for its time. Its electrical system, including the fuse box and relay components, was crucial for maintaining the vehicle’s operational integrity and functionality.
In the Cadillac Escalade GMT 400, the fuse box housed various fuses designed to protect different electrical circuits throughout the vehicle. These circuits powered essential components such as the engine control module, lighting systems, climate control, entertainment features, and more. Fuses were engineered to break the circuit in the event of an electrical overload or short circuit, preventing damage to associated systems.
Relays in the Cadillac Escalade GMT 400 served as electrically operated switches responsible for controlling high-current circuits. They facilitated the precise activation and deactivation of functions such as the starter motor, fuel pump, air conditioning compressor, and power windows or seats. Efficient relay operation ensured optimal power distribution and reliable performance of the vehicle’s electrical systems.
Regular inspection and maintenance of the fuse box and relays were essential to ensure the Cadillac Escalade GMT 400 operated smoothly. This included checking fuses for signs of wear or damage, ensuring relay connections were secure, and promptly addressing any electrical issues that arose. Proper care of these components helped maintain the vehicle’s electrical integrity, enhancing safety and driving satisfaction in the Cadillac Escalade GMT 400 (1998-2000).
MUST READ: DYI – How to Check Car Fuses?
(1998-2000) Cadillac Escalade GMT 400 fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Cadillac Escalade GMT 400 1998-2000 fuse assignment
- Cigar lighter (power outlet) fuse in the Cadillac Escalade is the fuse №. 7 in the Instrument panel fuse box.
Year of production: 1998, 1999, 2000
Passenger compartment fuse box
Fuse Box Location
It is located on the driver’s side of the instrument panel, behind the cover.
Fuse box diagram
Assignment of the fuses in the instrument panel
| № | Description |
|---|---|
| 1 | Stop/TCC Switch, Buzzer, CHMSL, Hazard Lamps, Stoplamps |
| 2 | Transfer Case |
| 3 | Courtesy Lamps, Cargo Lamp, Glove Box Lamp, Dome/Reading Lamps, Vanity Mirrors, Power Mirrors |
| 4 | Instrument Cluster, DRL Relay, Lamp Switch, Keyless Entry, Low Coolant Module, Illuminated Entry Module |
| 5 | Rear Comfort Controls |
| 6 | Cruise Control |
| 7 | Auxiliary Power Outlet |
| 8 | Crank |
| 9 | License Lamp, Parking Lamps, Taillamps, Tailgate Lamps, Front Sidemarkers, Fog Lamp Relay, Door Switch Illumination, Fender Lamps, Headlamp Switch Illumination |
| 10 | Air Bag System |
| 11 | Wiper Motor, Washer Pump |
| 12 | A/C, A/C Blower, High Blower Relay |
| 13 | Power Amp, Rear Liftglass, Cigarette Lighter, Door Lock Relay, Power Lumbar Seat |
| 14 | 4WD Indicator, Cluster, Front and Rear Comfort Controls, Instrument Switches, Radio Illumination, Chime Module |
| 15 | DRL Relay, Fog Lamp Relay |
| 16 | Front and Rear Turn Signals, Back-Up Lamps, BTSI Solenoid |
| 17 | Radio (Ignition) |
| 18 | 4WAL/VCM, ABS, Cruise Control |
| 19 | Radio (Battery) |
| 20 | PRNDL, Automatic Transmission, Speedometer, Check Gages, Warning Lights |
| 21 | Security/Steering |
| 22 | Auxiliary Power, Headlamp Delay |
| 23 | Rear Wiper, Rear Washer Pump |
| 24 | Front Axle, 4WD Indicator Lamp, TP2 Relay |
| A | Power Door Lock, Six-Way Power Seat, Keyless Entry Module (Circuit Breaker) |
| B | Power Windows (Circuit Breaker) |
Fuse Box in the engine compartment
Fuse Box Location
Fuse box diagram
Assignment of the fuses and relays in the engine compartment
| Name | Description |
|---|---|
| ECM-B | Fuel Pump, PCM/VCM |
| RR DEFOG | Rear Window Defogger |
| IGN-E | Auxiliary Fan Relay Coil, A/C Compressor Relay, Hot Fuel Module |
| FUEL SOL | Not Used |
| GLOW PLUG | Not Used |
| HORN | Horn, Underhood Lamp |
| AUX FAN | Auxiliary Fan |
| ECM-1 | Injectors, PCM/VCM |
| HTD ST-FR | Heated Front Seats |
| A/C | Air Conditioning |
| HTD MIR | Heated Outside Mirrors |
| ENG-1 | Ignition Switch, EGR, Canister Purge, EVRV Idle Coast Solenoid, Heated O2 |
| HTD ST-RR | Heated Rear Seats |
| AUX B | Trailer Wiring |
| AUX A | SEO Wiring |
| LIGHTING | Headlamp and Panel Dimmer Switch, Fog and Courtesy Fuses |
| BATT | Battery, Fuse Block Busbar |
| IGN A | Ignition Switch |
| IGN B | Ignition Switch |
| ABS | Anti-Lock Brake Module |
| BLOWER | Hi Blower and Rear Blower Relays |
| STOP/HAZ | Stoplamps |
| HEATED SEATS | Heated Seats |
Conclusion
For owners and enthusiasts of classic Cadillac Escalade GMT 400 1998-2000, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Cadillac’s craftsmanship and innovation in the automotive industry during that era.
