The Cadillac ELR, produced from 2014 to 2016, was a compact luxury plug-in hybrid coupe known for its sleek design, advanced technology, and efficient performance. Its electrical system, which includes the fuse box and relay components, played a crucial role in its operation and reliability.
In the Cadillac ELR, the fuse box housed fuses that protected various electrical circuits throughout the vehicle. These circuits powered essential components such as the hybrid powertrain, electric motors, battery management system, lighting systems, climate control, and more. Fuses were designed to interrupt the circuit in the event of an electrical overload or short circuit, preventing damage to associated systems.
Relays in the Cadillac ELR served as electrically operated switches that controlled high-current circuits related to the hybrid powertrain and auxiliary systems. They facilitated the activation and deactivation of functions such as the electric motors, charging system, air conditioning compressor, and power windows or seats. Efficient relay operation ensured smooth power distribution and optimized performance of the vehicle’s electrical systems.
Regular inspection and maintenance of the fuse box and relays were essential to ensure the Cadillac ELR 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 ELR 2014-2016.
MUST READ: DYI – How to Check Car Fuses?
(2014-2016) Cadillac ELR 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 ELR 2014-2016 fuse assignment
- Cigar lighter (power outlet) fuses in the Cadillac ELR are the fuse №. F1 (Power Outlet/Cigarette Lighter – Top of IP Storage Bin) and fuse №. F15 (Inside Console Bin Power Outlet) in the Left side Instrument panel fuse box.
Year of production: 2014, 2015, 2016
Passenger compartment
Fuse Box Location
There are two fuse boxes that are located on both sides of the instrument panel, behind covers.
Fuse box diagram (Left side)
Assignment of the fuses and relays in the instrument panel (Left side)
| № | Ampere rating [A] | Description |
|---|---|---|
| F1 | 20 | Power Outlet/Cigarette Lighter – Top of IP Storage Bin |
| F2 | 15 | Infotainment (HMI, CD) |
| F3 | 10 | Instrument Cluster |
| F4 | 10 | Infotainment Display, Steering Wheel Control Switches |
| F5 | 10 | Heating, Ventilation, & Air Conditioning |
| F6 | 10 | Airbag (Sensing Diagnostic Module/Passenger Sensing Module) |
| F7 | 15 | Data Link Connector, Left (Primary) |
| F8 | 10 | Column Lock |
| F9 | 10 | OnStar |
| F10 | 15 | Body Control Module 1/Body Control Module Electronics/Keyless Entry/Power Moding/Center High Mounted Stoplamp/License Plate Lamps/Left Daytime Running Lamp/Left Parking Lamps/Trunk Release Relay Control/Washer Pump Relay Control/Switch Indicator Lights |
| F11 | 15 | Body Control Module 4/Left Headlamp |
| F12 | — | Empty |
| F13 | — | Empty |
| F14 | — | Empty |
| F15 | 20 | Power Outlet (Inside Console Bin) |
| F16 | 5 | Wireless Charger |
| F17 | — | Empty |
| F18 | — | Empty |
| Diode | Empty | |
| Relays | ||
| R1 | Retained Accessory Power Relay for Power Outlets | |
| R2 | Empty | |
| R3 | Empty | |
| R4 | Empty |
Fuse box diagram (Right side)
Assignment of the fuses and relays in the instrument panel (Right side)
| № | Ampere rating | Description |
|---|---|---|
| F1 | 2 | Steering Wheel Switch |
| F2 | 10 | Auto Headlamp Leveling |
| F3 | 10 | Motorized Cup Holder |
| F4 | 15 | Body Control Module 3/Right Headlamp |
| F5 | 7.5 | Body Control Module 2/ Body Control Module Electronics/ Trunk Lamp/ Right Daytime Running Lamp/Shifter Lock/Switch Backlighting |
| F6 | 15 | Tilt/Telescope Column |
| F7 | 7.5 | Body Control Module 6/ Map Lights/ Courtesy Lights/ Back-up Lamp |
| F8 | 15 | Body Control Module 7/Left Front Turn Signal/Right Rear Stop and Turn Signal Lamp |
| F9 | — | Empty |
| F10 | 15 | Data Link Connector, Right (Secondary) |
| F11 | 7.5 | Universal Garage Door Opener, Rain Sensor, Front Camera |
| F12 | 30 | Blower Motor |
| F13 | — | Empty |
| F14 | — | Empty |
| F15 | — | Empty |
| F16 | 10 | Glove Box |
| F17 | — | Empty |
| F18 | — | Empty |
| DIODE | Empty | |
| Relays | ||
| R1 | Empty | |
| R2 | Glove Box Door | |
| R3 | Empty | |
| R4 | Empty |
Engine compartment
Fuse Box Location
Fuse box diagram
Assignment of the fuses and relays in the Engine compartment
| № | Ampere rating [A] | Description |
|---|---|---|
| Mini Fuses | ||
| 1 | 15 | Engine Control Module – Switched Power |
| 2 | 7.5 | Emissions |
| 3 | – | Not Used |
| 4 | 15 | Ignition Coils/Injectors |
| 5 | 10 | Column Lock |
| 6a | – | Empty |
| 6b | – | Empty |
| 7 | – | Empty |
| 8 | – | Empty |
| 9 | 7.5 | Heated Mirrors |
| 10 | 5 | Air Conditioning Control Module |
| 11 | 7.5 | Traction Power Inverter Module – Battery |
| 12 | – | Not Used |
| 13 | 10 | Cabin Heater Pump and Valve |
| 14 | – | Not Used |
| 15 | 15 | Traction Power Inverter Module and Transmission Control Module – Battery |
| 17 | 5 | Engine Control Module – Battery |
| 22 | 10 | Left High-Beam Headlamp |
| 24 | – | Empty |
| 25 | – | Empty |
| 26 | – | Not Used |
| 31 | 5 | Adaptive Cruise Control/Auto Headlamp |
| 32 | 5 | Vehicle Integration Control Module |
| 33 | 10 | Run/Crank for Heated Steering Wheel |
| 34 | 10 | Vehicle Integration Control Module – Battery |
| 35 | – | Not Used |
| 36 | 10 | Power Electronics Coolant Pump |
| 37 | 5 | Cabin Heater Control Module |
| 38 | 10 | Rechargeable Energy Storage System (High Voltage Battery) Coolant Pump |
| 39 | 10 | Rechargeable Energy Storage System (High Voltage Battery) Control Module |
| 40 | 10 | Front Windshield Washer |
| 41 | 10 | Right High-Beam Headlamp |
| 46 | – | Empty |
| 47 | – | Empty |
| 49 | – | Empty |
| 50 | 10 | Run/Crank – Rear Vision Camera, Accessory Power Module |
| 51 | 7.5 | Run/Crank for ABS, Aero Shutter, VITM |
| 52 | 5 | Engine Control Module/Transmission Control Module – Run/Crank |
| 53 | 7.5 | Traction Power Inverter Module – Run/Crank |
| 54 | 7.5 | Run/Crank – Fuel System Control Module, Air Conditioning Control Module, On Board Charger, Instrument Cluster, Automatic Occupant Sensing, Mirrors |
| J-Case Fuses | ||
| 16 | 20 | AIR Solenoid (PZEV Only) |
| 18 | 30 | Rear Defogger Lower Grid |
| 19 | 30 | Power Window – Front |
| 20 | – | Empty |
| 21 | 30 | Antilock Brake System Electronic Control Unit |
| 23 | – | Empty |
| 27 | 40 | AIR Pump (PZEV Only) |
| 28 | – | Empty |
| 29 | 30 | Front Wipers |
| 30 | 60 | Antilock Brake System Motor |
| 42 | 30 | Cooling Fan – Right |
| 43 | 30 | Front Wipers |
| 44 | 40 | Charger |
| 45 | – | Empty |
| 48 | 30 | Cooling Fan – Left |
| Mini Relays | ||
| 3 | Powertrain | |
| 4 | Heated Mirrors | |
| 7 | Empty | |
| 9 | AIR Pump (PZEV Only) | |
| 11 | Empty | |
| 12 | Empty | |
| 13 | Empty | |
| 14 | Run/Cran | |
| Micro Relays | ||
| 1 | Empty | |
| 2 | AIR Solenoid (PZEV Only) | |
| 6 | Empty | |
| 8 | Empty | |
| 10 | Empty | |
| Ultra Micro Relays | ||
| 5 | Empty |
Fuse Boxes in the luggage compartment
Fuse Box Location
They are located in the left side of the trunk, behind the cover.
Fuse box diagram (Fuse Box №. 1)
Assignment of the fuses and relays in the Luggage compartment box №. 1
| № | Ampere rating [A] | Description |
|---|---|---|
| F1 | — | Empty |
| F2 | 15 | Fuel System Control Module |
| F3 | 5 | Passive Entry/Passive Start |
| F4 | 15 | Heated Seats |
| F5 | 2 | Regulated Voltage Control, Current Sensor |
| F6 | 10 | Fuel (Diurnal Valve and Evap. Leak Check Module) |
| F7 | 15 | Accessory Power Module Cooling Fan |
| F8 | 30 | Amplifier |
| F9 | — | Empty |
| F10 | 5 | Regulated Voltage Control/Ultrasonic Front and Rear Parking Assist, Side Blind Zone |
| F11 | 15 | Horn |
| F12 | — | Empty |
| F13 | 30 | Electric Parking Brake |
| F14 | 30 | Rear Defog (Upper Grid) |
| F15 | — | Empty |
| F16 | 10 | Trunk Release |
| F17 | — | Empty |
| F18 | — | Empty |
| DIODE | Empty | |
| Relays | ||
| R1 | Rear Defog (Upper Grid) | |
| R2 | Trunk Release | |
| R3 | Empty | |
| R4 | Empty | |
| R5 | Empty | |
| R6 | Empty | |
| R7/R8 | Horn |
Fuse box diagram (Fuse Box №. 2)
Assignment of the fuses and relays in the Luggage compartment box №. 2
| № | Ampere rating [A] | Description |
|---|---|---|
| F1 | — | Empty |
| F2 | 15 | Radio |
| F3 | 10 | Pedestrian Protection |
| F4 | 10 | CDC |
| F5 | 10 | Memory Seat Module |
| F6 | — | Empty |
| F7 | 10 | Mirror/Window/Seat Switch |
| F8 | 20 | Passive Entry/Passive Start 2 |
| F9 | 15 | Heated Seat 2 |
| F10 | — | Empty |
| F11 | — | Empty |
| F12 | 30 | Driver Power Seat |
| F13 | 30 | Passenger Power Seat |
| F14 | — | Empty |
| F15 | — | Empty |
| F16 | — | Empty |
| F17 | — | Empty |
| F18 | — | Empty |
| DIODE | Empty | |
| Relays | ||
| R1 | Empty | |
| R2 | Empty | |
| R3 | Empty | |
| R4 | Empty |
Conclusion
For owners and enthusiasts of classic Cadillac ELR 2014-2016, 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.