Electrical System
Electrical System Overload
The vehicle has fuses and circuit breakers to protect against an electrical system overload. When the current electrical load is too heavy, the circuit breaker opens and closes, protecting the circuit until the current load returns to normal or the problem is fixed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. Fuses and circuit breakers protect power devices in the vehicle. Replace a bad fuse with a new one of the identical size and rating. If there is a problem on the road and a fuse needs to be replaced, the same amperage fuse can be borrowed. Choose some feature of the vehicle that is not needed to use and replace it as soon as possible.
VEHICLE CARE 265
Headlamp Wiring
An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off.
Windshield Wipers
If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart. Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage. Always clear ice and heavy snow from the windshield before using the windshield wipers. If the overload is caused by an electrical problem and not snow or ice, be sure to get it fixed.
Fuses and Circuit Breakers
The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit
breakers. This greatly reduces the chance of damage caused by electrical problems.
{ Danger
Fuses and circuit breakers are marked with their ampere rating. Do not exceed the specified amperage rating when replacing fuses and circuit breakers. Use of an oversized fuse or circuit breaker can result in a vehicle fire. You and others could be seriously injured or killed.
To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a new one of the identical size and rating. Fuses of the same amperage can be temporarily borrowed from another fuse location, if a fuse goes out. Replace the fuse as soon as possible.
Engine Compartment Fuse Block
To remove the fuse block cover, squeeze the three retaining clips on the cover and lift it straight up.
Caution
Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.
The vehicle may not be equipped with all of the fuses, relays, and features shown.
Fuses Usage
1 Transmission control module
2 Engine control module 3 A/C clutch
4 – 5 Engine control module/Ignition
6 Front wiper
7 – 8 Ignition coils – even
9 Ignition coils – odd
10 Engine control module
11 Mass air flow sensor/ Post catalytic converter O2 sensors
12 Starter
13 Transmission control module/Chassis control module ignition
14 Rear heated seat – passenger side
15 Rear heated seat – driver side
16 – 17 Sunshade/Ventilated seats
18 Autonet
19 – 20 –
21 Rear power windows
22 Sunroof
23 Variable effort steering module
24 Front power windows
25 Retained accessory power
26 ABS pump
27 Electric parking brake
28 Rear window defogger
29 Passive entry/Passive start
30 Spare
31 Heated driver seat
32 Stoplamps – center high mounted stoplamp/ Backup-reverse lamps/Interior
33 Heated passenger seat
34 ABS valves
35 Amplifier
36 Taillamp – driver side
37 Right high-beam headlamp
38 Left high-beam headlamp
39 Taillamp – passenger side
40 Long range radar
41 Brake vacuum assist pump
42 Cooling fan high speed
43 – 44 –
45 Cooling fan low speed
46 Cooling fan control
47 Pre-catalytic converter O2 sensor heater/Canister purge solenoid
48 Low temperature radiator coolant pump
49 Right headlamp LED
50 Left headlamp LED
51 Horn
52 Display/Ignition
53 Air quality sensor/ Inside mirror/Rear vision camera
54 HVAC/Reflective LED alert display
55 Driver and passenger door switches/Outside rearview mirror switch/Mirror memory module
56 Windshield washer 57 – 58 – 59 –
60 Heated outside mirror 61 –
62 Front seats massage module 63 –
64 Spare
65 Spare
66 Trunk release
67 Chassis control module
68 –
69 Battery voltage sensor
70 Canister vent solenoid
71 Memory seat module
72 Electric power steering
Relays Usage
1 A/C clutch
2 Starter 3 –
4 Wiper speed
5 Wiper control 6 –
7 Powertrain 8 –
9 Cooling fan – high speed
10 Cooling fan – low speed
11 Taillamps/Parking lamps 12 –
13 Cooling fan control
14 Low-beam LED headlamps
15 Run/Crank 16 –
17 Rear window and mirror defogger
Instrument Panel Fuse Block
The instrument panel fuse block is in the instrument panel, on the driver side of the vehicle. To access the fuses, open the fuse panel door by pulling down at the top. Press in on the sides of the door to release it from the instrument panel. Pull the door toward you to release it from the hinge.
The vehicle may not be equipped with all of the fuses, relays, and features shown.
Fuses Usage
1 Wireless charger
module/USB charge 2 Body control
module 7 3 Body control
module 5 4 Radio 5 Infotainment display/
Head-up display/ Instrument cluster
Fuses Usage
6 Power outlet 1 7 Power outlet 2 8 Body control
module 1 9 Body control
module 4 10 Body control
module 8 11 Front HVAC blower 12 Passenger seat 13 Driver seat 14 Diagnostic link
connector 15 Airbag AOS 16 Glove box 17 HVAC controller 18 Logistics 19 Front camera 20 Telematics (OnStar) 21 CGM
Fuses Usage
22 Steering wheel
controls/Backlight 23 Body control
module 3 24 Body control
module 2 25 Power steering
column 26 AC DC inverter
Relays Usage
R1 Glove box R2 Logistics R3 Retained accessorypower
Rear Compartment Fuse Block
The rear compartment fuse block is on the left side of the trunk behind a cover. The vehicle may not be equipped with all of the fuses, relays, and features shown.
Fuses Usage
F01 – F02 – F03 – F04 Suspension leveling compressor
F05 – F06 – F07 – F08 –/Front courtesy lamps/Footwell, puddle lamps
F09 –
F10 – F11 – F12 – F13 Spare/MID Power Window
F14 – F15 –/Spare
F16 –/Video processing module
F17 – F18 Semi-active damping system
F19 Universal remote system/Rain, light, and humidity sensor
F20 –/Shunt F21 Side blind zone alert F22 – F23 All wheel drive F24 – F25 –
F26 – F27 – F28 – F29 – F30 External object alculation module
F31 Park assist/Lane departure warning/ Lane keep assist
F32 – F33 – F34 – F35 – F36 – F37 –
Relays Usage
K1 – K2 Front courtesy lamps/ Footwell, puddle lamps
K3 Suspension leveling compressor
K4 –
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