2012 Impala Fuse Box Diagram: Exploring the Fuse Boxes
2012 Impala Fuse Box Diagram: Find the correct fuse for the circuit you’re working on
In your 2012 Impala, you’ve got two fuse boxes to keep track of the underhood fuse box and the Passenger Compartment Fuse Panel. I’ll show you the layout. This 2012 Fuse Box Diagram article covers the layouts and circuits for both fuse boxes.
Let’s start with the one under the hood. Just pop the hood and find it in front of the strut tower on the passenger side of the engine compartment. It’s like the nerve center for your truck’s major systems—things like engine management, emissions, and ABS brakes are all controlled by the fuses in this box.
Now, for the second fuse box, crawl under the dash on the passenger side. It’s tucked away in the footwell area to the right of the floor mat, in the carpet molding (also referred to as the kick panel)
Remove the fuse block door to access the fuses.
To learn more about automotive fuses, see this article
To learn how to check a fuse visually or without removing it, see this article
How to find your fuse and the devices served by that fuse
There are 53 fuse and relay slots in the Underhood Fuse Box. There are several ways to find the fuse you want in the chart below.
1) Enter a search term in the search box.
2) If you’d like to scroll all the fuses, change the number of entries to 100 in “Show Entries” box. Or, click NEXT at the bottom right of the table to scroll 10 items at a time.
Find the most commonly replaced fuses here
The fuse box diagrams and tables below show all the fuses and all the relays. But most DIYers are looking for fuses and relays for the lights, power ports, and the blower motor. I’ve listed the most commonly checked/replaced fuses here to save time. I’ve also listed the most commonly replaced bulbs. A blown fuse or bulb are the two most common reasons for lighting issues.
Underhood Fuse Box= UFB, Instrument Panel Fuse Box = IPFB
Power Ports: Fuse: #Aux PWR 25A Instrument Panel Outlets 1 & 2 UFB
Blower Motor: Fuse BATT4 30A UFB
Headlight Driver’s Side Fuse LT LO BEAM 10A UFB
Headlight Passenger Side: Fuse RT LO BEAM 10A UFB
Horn: Fuse HORN 15A UFB
Headlight High Beam Driver’s Side: Fuse LT HI BEAM 10A UFB
Headlight High Beam Passenger Side Fuse: RT HI BEAM 10A UFB
Stop/Turn/Parking Lamps Driver’s Side: Fuse # LT PARK 10A
Stop/Turn/Parking Lamps Passenger Side: Fuse # RT PARK 10A
Power Windows: Instrument Panel Fuse Box
2012 Impala Fuse Box Diagram for Underhood fuse box
2012 Imapal Fuse Box Diagram for Underhood Fuse Box
| Fuse Number | Amperage | Circuits Protected |
|---|---|---|
| A/C CMPRSR | 10 | A/C Compressor Clutch |
| ABS MTR | 60 | Electronic Brake Control Module (EBCM) |
| ABS MTR2 | 60 | Electronic Brake Control Module (EBCM) |
| AIRBAG/DISPLAY | 10 | Instrument Panel Cluster (IPC), HVAC Control Module, Inflatable Restraint Passenger Air Bag On/Off Indicator, and Inflatable Restraint Sensing and Diagnostic Module (SDM) |
| AUX PWR | 25 | Accessory Power Outlet — I/P 1 and Accessory Power Outlet — I/P 2 |
| BATT 1 | 60 | CNSTR, XM, AMP AUX Fuses, and Trunk Relay, HTD/SEAT, AIRBAG, PWR/MIR, S/ROOF, DR/LCK Fuses, PWR/SEAT Circuit Breaker, and RAP |
| BATT 2 | 60 | Relay |
| BATT 3 | 40 | Rear Window Defogger Grid |
| BATT 4 | 30 | Blower Motor Control Module |
| BCM | 10 | Body Control Module (BCM), Data Link Connector (DLC), Remote Control Door Lock Receiver (RCDLR), Instrument Panel DISPLAY Fuse 10A Cluster (IPC), and HVAC Control Module |
| DRL 1 | 15 | DRL 2 Fuse |
| DRL 2 | 15 | LT LO BEAM Fuse, RT LO BEAM Fuse, ECM |
| ECM IGN | 10 | Engine Control Module (ECM) |
| ECM/TCM | 15 | Engine Control Module (ECM) and Transmission Control Module (TCM) |
| EMISSIONS 1 | 15 | Heated Oxygen Sensor (HO2S) 1, Heated Oxygen Sensor (HO2S) 2, and Evaporative Emission (EVAP) Canister Purge Solenoid Valve Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor, Valve Lifter Oil Manifold (VLOM) |
| EMISSIONS 2 | 15 | Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor, Valve Lifter Oil Manifold (VLOM) Assembly (LZG), Secondary Air Injection (AIR) Pump Relay (NU3), Secondary Air Injection (AIR) Solenoid Relay (NU3), A/C CMPRSR Relay, FAN 1 Relay, FAN 2 Relay, and FAN 3 Relay |
| FAN1 | 30 | FAN 1 Relay |
| FAN2 | 30 | FAN 3 Relay |
| FOG LAMPS | 15 | Fog Lamp — Left Front and Fog Lamp — Right Front |
| FSCM | 15 | Fuel Pump Flow Control Module |
| HDLP MDL | 15 | Emergency Vehicle Headlamp Flasher |
| HORN | 15 | Horn |
| HTD MIR | 10 | Outside Rearview Mirror — Driver and Outside Rearview Mirror — Passenger |
| INJ 1 | 20 | Fuel Injectors 1-6 |
| INJ 2 | 10 | Ignition Control Module |
| INT LIGHTS | 10 | Body Control Module (BCM) |
| INT LTS/PNL DIM | 15 | Body Control Module (BCM) |
| LT HI BEAM FUSE | 10 | Headlamp — High Beam — Left or Emergency Vehicle Headlamp Flasher |
| LT LO BEAM | 10 | Headlamp — Low Beam — Left |
| LT PARK | 10 | Marker lamp — LF, Park/Turn Signal Lamp — Left Front, Tail Lamp — Left, and Tail/Stop and Turn Signal — Left |
| LT SPOT | 15 | spot Lamp — Left |
| LT T/SIG | 15 | Body Control Module (BCM) |
| PWR DROP/CRNK | 10 | Blunt Cut Wire |
| RADIO | 20 | Radio |
| RT HI BEAM | 10 | Headlamp — High Beam — Right or Emergency Vehicle Headlamp Flasher |
| RT LO BEAM | 10 | Headlamp — Low Beam — Right |
| RT PARK | 10 | Marker Lamp — RF, Park/Turn Signal Lamp — RF, Tail Lamp — Right, and Tail/Stop and Turn Signal — Right |
| RT SPOT | 15 | Spot Lamp — Right |
| RT T/SIG | 15 | Body Control Module (BCM) |
| RVC SEN | 10 | Body Control Module (BCM) |
| Spare Fuse | 2 | Not Used |
| Spare Fuse | 10 | Not Used |
| Spare Fuse | 15 | Not Used |
| Spare Fuse | 20 | Not Used |
| Spare Fuse | 20 | Not Used |
| Spare Fuse | 25 | Not Used |
| STRG WHL | 2 | Steering Wheel Controls — Left and Steering Wheel Controls — Right |
| STRTR | 40 | Starter |
| TRANS | 10 | Transmission Control Module (TCM) 1-2 Shift Solenoid (1-2 SS) Valve, 2-3 Shift Solenoid (2-3 SS) Valve, Torque Converter Clutch (TCC) Solenoid Valve, |
| VAC PUMP | 20 | Brake Booster Pump - Auxiliary |
| WPR | 25 | WIPER PCB Relay |
| WSW | 15 | Windshield Washer Fluid Pump |
A/C CMPRSR Relay A/C CMPRSR Fuse
FAN 1 Relay — Engine Cooling Fan — Left
FAN 2 Relay — Engine Cooling Fan — Right
FAN 3 Relay — Engine Cooling Fan — Right
PWR/TRN Relay — ETC/ECM, !NJ 1, INJ 2, EMISSIONS 1, and EMISSIONS 2 Fuses
REAR DEFOG Relay — BATT 3 and HTD MIR Fuses
STRTR Relay STRTR Fuse
Vacuum Pump Relay — VAC Pump Fuse
The Relays shown below are integral to the underhood fuse box and are NOT serviceable
DRL PCB Relay DRL 1 Fuse
FOG LP PCB Relay
FOG LAMPS Fuse
HIGH BEAM PCB Relay
LT HI BEAM and RT HI BEAM Fuses
HORN PCB Relay
HORN Fuse
HORN PCB Relay — HORN Fuse
IGN MAIN PCB Relay — AIRBAG/DISPLAY, ECM IGN, PWR DROP/CRNK, and TRANS Fuses
LOW BEAM PCB Relay — DRL 1 LT LO BEAM, and RT LO BEAM Fuses
PARK LP PCB Relay — LT PARK and RT PARK Fuses WIPER PCB Relay — WIPER HIGH PCB Relay WIPER HIGH PCB Relay — Windshield Wiper Motor
WS WASH PCB Relay — WSW Fuse
A note about fuses, battery power and keep alive memory
If you disconnect the battery or remove the PCM fuses from the fuse box, the PCM will lose its adaptive memory and baseline throttle body position. You can avoid this by providing backup power using a jumper pack and an inexpensive OBDII cable. See this article for more information on providing backup power to prevent the loss of adaptive memory.
2012 Impala Fuse Box Diagram for Instrument Panel Fuse Box
2012 impala instrument panel fuse box
| Fuse Number | Amperage | Circuits Protected |
|---|---|---|
| AIRBAG | 10 | Inflatable Restraint Sensing and Diagnostic Module (SDM), Inflatable Restraint Front Passenger Presence System (PPS) Module |
| AMP | 25 | Audio Amplifier |
| AUX | 20 | Accessory Power Outlet – Center Seat, Accessory Power Outlet – Center Console 1, Accessory Power Outlet – Center Console 2, Accessory Power Outlet – Center Console Compartment |
| CNSTR | 10 | Evaporative Emission (EVAP) Canister Vent Solenoid |
| DR/LCK | 25 | DOOR UNLOCK PCB Relay – Driver, DOOR UNLOCK PCB Relay, and DOOR LOCK PCB Relay |
| HTD/SEAT | 20 | Heated Seat Control Module (KA1), Emergency Vehicle Rear Compartment Lid Lamps Relay |
| PWR/MIR | 2 | Outside Rearview Mirror Switch |
| RAP | 10 | Automatic Transmission Shift Lock Control Solenoid (with Floor Shifter), Inside Rearview Mirror (DD6), Sunroof Motor |
| S/ROOF | 20 | Sunroof Motor |
| TRUNK | 10 | Rear Compartment Lid Release Actuator |
| PWR/SEAT | 25A Circuit Breaker | Seat Adjuster Switch – Driver, Seat Adjuster Switch – Passenger |
| PWR/WNDW | 25A Circuit Breaker | Window Switch – Driver, and Window Switch – Passenger |
The relays listed below are non-serviceable Printed Circuit Board (PCB) relays and are internal to the instrument panel fuse box.
DOOR LOCK PCB Relay — Door Locks
DOOR UNLOCK PCB Relay — Door Lock – Passenger, Door Lock – Left Rear, Door Lock – Right Rear
DOOR UNLOCK PCB Relay – Driver — Door Lock – Driver
RAP Relay — RAP Fuse
©, 2024 Rick Muscoplat
Posted on by Rick Muscoplat