Page 334 of 478

Black plate (34,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
10-34 Vehicle Care
8. Push on the lamp side oppositethe clip until the lamp assembly
snaps into place.
Replacement Bulbs
Exterior Lamp Bulb
Number
Fog Lamp
(Uplevel Only) H11LL
License Plate Lamp W5WLL
For replacement bulbs not listed
here, contact your dealer.
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.
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.
Page 335 of 478

Black plate (35,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
Vehicle Care 10-35
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.
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
you can.To identify and check fuses, circuit
breakers, and relays, see
Engine
Compartment Fuse Block (CTS-V
Wagon) on page 10‑46 orEngine
Compartment Fuse Block (CTS
Coupe and Sedan) on page 10‑35
or Engine Compartment Fuse Block
(CTS-V Coupe and Sedan) on
page 10‑39 orEngine Compartment
Fuse Block (CTS Wagon) on
page 10‑42 andRear Compartment
Fuse Block (CTS Wagon) on
page 10‑54 orRear Compartment
Fuse Block (CTS-V Wagon) on
page 10‑56 orRear Compartment
Fuse Block (CTS Coupe and
Sedan) on page 10‑49 orRear
Compartment Fuse Block (CTS-V
Coupe and Sedan) on page 10‑52.
Engine Compartment
Fuse Block (CTS Coupe
and Sedan)
The underhood fuse block is on the
left side of the engine compartment.
Lift the fuse block cover to access
the fuses.
The vehicle may not be equipped
with all of the fuses and relays
shown.
Notice: Spilling liquid on any
electrical component on the
vehicle may damage it. Always
keep the covers on any electrical
component.
Page 336 of 478
Black plate (36,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
10-36 Vehicle Care
Mini-Fuses Usage11 Not Used
19 Antilock Braking System (ABS)
22 Display
23 Not Used Mini-Fuses Usage
24 Body Control Module 1
25 Automatic Forward Lighting System
(HID Only)
26 Body Control Module 5 Mini-Fuses Usage
27 Body Control Module 4
28 Navigation Motor
29 All-Wheel Drive
30 Transmission Control Module
Battery
31 Horn
33 Left Low-Beam Headlamp
(Domestic
Non-HID Only)
34 Pedestrian Protection System
(Export Only)
35 Body Control Module 3
36 Body Control Module 2
38 Headlamp Washer (HID Only)
Page 337 of 478

Black plate (37,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
Vehicle Care 10-37
Mini-Fuses Usage40 Right Low-Beam Headlamp
(Domestic
Non-HID Only)
41 Air Conditioning Compressor Clutch
43 Low-Beam Daytime Running Lamps
(non-HID), Left
Daytime Running
Lamps (HID), Left
Trailer Turn Signal
(Export Only)
46 Left High-Beam Headlamp
47 Right High-Beam Headlamp
50 Right Daytime Running Lamp,
Windshield
Washer Pump
51 Airbag System Ignition Switch Mini-Fuses Usage
52 Engine Control Module Ignition,
Transmission
Control Module
Ignition
54 Power Moding (Immobilizer
Module, Ignition
Switch)
55 Not Used
56 Windshield Wipers
57 Right Low-Beam (HID Only)
58 Daytime Running Lamps (non-HID),
Left Low-Beam
(HID Only)
59 Right Daytime Running Lamp (HID
Only), Right Trailer
Turn Signal
(Export Only) Mini-Fuses Usage
60 Instrument Panel Auxiliary Power
Outlet
61 Air Quality Sensor, Inside Rear View
Mirror, Rear
Camera
62 Ignition
64 Steering Wheel Illumination
65 Front Fog Lamps (HID Only)
69 Body Control Module 6, Body
Control Module 7
70 Emissions 1
71 Even Ignition Coils
72 Engine Control Module
73 Emissions 2
74 Odd Ignition Coils
Page 338 of 478
Black plate (38,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
10-38 Vehicle Care
Mini-Fuses Usage75 Transmission Output Speed
Sensor, Brake
Vacuum Relay
76 Spare
77 Spare
78 Spare
79 Spare
80 Spare
81 Spare
J-Case Fuses Usage
6 Cooling Fan 2
7 Cooling Fan 1
8 Starter
9 Brake Vacuum Pump
10 Antilock Brake System Motor J-Case
Fuses Usage
13 Not Used
14 Electric Parking Brake
15 Not Used
16 Not Used
17 Blower Motor
18 Rear Window Defogger
37 Not Used
Relays Usage 1 Cooling Fan 2
2 Cooling Fan 1
3 Starter
4 Rear Window Defogger
5 Instrument Panel Auxiliary Power
Outlet Relays Usage
12 Horn
20 Headlamp Washer (HID Only)
21 Cooling Fan (Series/ Parallel)
32 Air Conditioning Compressor Clutch
39 Windshield Washer Pump
42 Right Daytime Running Lamp,
Trailer Turn Signal
44 Low-Beam (non-HID), Left
Daytime Running
Lamps (HID), Left
Trailer Turn Signal
(Export Only)
45 Front Fog Lamps (HID Only)
48 High-Beam Headlamps
Page 339 of 478
Black plate (39,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
Vehicle Care 10-39
RelaysUsage
49 Daytime Running Lamps (Non-HID),
Low-Beam
Headlamps (HID)
53 Not Used
63 Main Ignition
66 Windshield Wipers
67 Powertrain
68 Windshield Wipers High Speed
Engine Compartment
Fuse Block (CTS-V Coupe
and Sedan)
This fuse block is on the left side of
the engine compartment.
Lift the fuse block cover to access
the fuses.
The vehicle may not be equipped
with all of the fuses and relays
shown.
Notice:Spilling liquid on any
electrical component on the
vehicle may damage it. Always
keep the covers on any electrical
component.
Page 340 of 478
Black plate (40,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
10-40 Vehicle Care
Mini‐Fuses Usage11 Not Used
19 Antilock Braking System (ABS)
22 Display
23 Sunroof Mini‐Fuses Usage
24 Body Control Module 1
25 Automatic Forward Lighting System
(HID Only)
26 Body Control Module 5 Mini‐Fuses Usage
27 Body Control Module 4
28 Navigation Motor
29 Not Used
30 Transmission Control Module
Battery
31 Horn
33 Not Used
34 Pedestrian Protection System
(Export Only)
35 Body Control Module 3
36 Body Control Module 2
38 Headlamp Washer (HID Only)
40 Not Used
41 Air Conditioning Compressor Clutch
Page 341 of 478
Black plate (41,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
Vehicle Care 10-41
Mini‐Fuses Usage43 Left Daytime Running
Lamps (HID)
46 Left High‐Beam Headlamp
47 Right High‐Beam Headlamp
50 Right Daytime Running Lamp,
Windshield
Washer Pump
51 Airbag System Ignition Switch
52 Engine Control Module Ignition,
Transmission
Control Module
Ignition
54 Power Moding (Immobilizer
Module, Ignition
Switch)
55 Intercooler Pump Mini‐Fuses Usage
56 Windshield Wipers
57 Right Low‐Beam (HID Only)
58 Left Low‐Beam (HID Only)
59 Right Daytime Running Lamp
(HID Only)
60 Instrument Panel Auxiliary Power
Outlet
61 Air Quality Sensor, Inside Rear View
Mirror, Rear
Camera
62 Ignition
64 Steering Wheel Illumination
65 Front Fog Lamps (HID Only) Mini‐Fuses Usage
69 Body Control Module 6, Body
Control Module 7
70 Emissions 1
71 Even Ignition Coils
72 Odd Ignition Coils
73 Emissions 2
74 Engine Control Module
75 Not Used
76 Spare
77 Spare
78 Spare
79 Spare
80 Spare
81 Spare