Page 321 of 478

Black plate (21,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
Vehicle Care 10-21
Notice:If the pressure cap is not
tightly installed, coolant loss and
possible engine damage may
occur. Be sure the cap is properly
and tightly secured.
If the coolant is not at the proper
level when the system cools down
again, see your dealer.
Engine Overheating
The vehicle has several indicators
to warn of engine overheating.
There are two engine hot messages
that may be displayed in the Driver
Information Center (DIC). See
Engine Cooling System Messages
on page 5‑34 for more information.
You may decide not to lift the hood
when one of these warnings appear,
but get service help right away. See
Roadside Service (U.S. and
Canada) on page 13‑7 orRoadside
Service (Mexico) on page 13‑9.
If you do decide to lift the hood,
make sure the vehicle is parked on
a level surface. Then check to see if the engine
cooling fans are running. If the
engine is overheating, the fan(s)
should be running. If they are not,
do not continue to run the engine
and have the vehicle serviced.
Notice:
Running the engine
without coolant may cause
damage or a fire. Vehicle damage
would not be covered by the
warranty. See Overheated Engine
Protection Operating Mode on
page 10‑22 for information on
driving to a safe place in an
emergency.
If Steam Is Coming from the
Engine Compartment
{WARNING
Steam from an overheated engine
can burn you badly, even if you
just open the hood. Stay away
from the engine if you see or hear
steam coming from it. Just turn it
(Continued)
WARNING (Continued)
off and get everyone away from
the vehicle until it cools down.
Wait until there is no sign of
steam or coolant before you open
the hood.
If you keep driving when the
engine is overheated, the liquids
in it can catch fire. You or others
could be badly burned. Stop the
engine if it overheats, and get out
of the vehicle until the engine
is cool.
If No Steam Is Coming from
the Engine Compartment
If an engine overheat warning is
displayed but no steam can be seen
or heard, the problem may not be
too serious. Sometimes the engine
can get a little too hot when the
vehicle:
.Climbs a long hill on a hot day.
.Stops after high-speed driving.
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 342 of 478
Black plate (42,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
10-42 Vehicle Care
J-CaseFuses Usage
6 Cooling Fan 2
7 Cooling Fan 1
8 Starter
9 Not Used
10 Antilock Brake System Motor
13 Not Used
14 Electric Parking Brake
15 Not Used
16 Not Used
17 Blower Motor
18 Rear Window Defogger
37 Magnetic Ride/ Suspension Control Relays Usage
1 Cooling Fan 2
2 Cooling Fan 1
3 Starter
4 Rear Window Defogger
5 Instrument Panel Auxiliary Power
Outlet
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
44 Left Daytime Running Lamp (HID) Relays Usage
45 Front Fog Lamps (HID Only)
48 High‐Beam Headlamps
49 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 Wagon)
This fuse block is on the left side of
the engine compartment.
Page 345 of 478
Black plate (45,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
Vehicle Care 10-45
Mini‐Fuses Usage60 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 Mini‐Fuses Usage
75 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 Transmission Control Module
Battery
37 Trailer (Export Only)
Relays Usage 1 Cooling Fan 2
2 Cooling Fan 1
3 Starter
4 Rear Window Defogger
5 Instrument Panel Auxiliary Power
Outlet
Page 346 of 478
Black plate (46,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
10-46 Vehicle Care
RelaysUsage
12 Horn
20 Headlamp Washer (HID Only)
21 Cooling Fan (Series/ Parallel)
32 Air Conditioning Compressor Clutch
39 Not Used
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 Relays
Usage
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
Wagon)
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 348 of 478

Black plate (48,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
10-48 Vehicle Care
Mini-Fuses Usage43 Left Daytime Running
Lamp (HID)
46 Left High-Beam Headlamp
47 Right High-Beam Headlamp
50 Right Daytime Running Lamp
51 Airbag System Ignition Switch
52 Engine Control Module Ignition,
Transmission
Control Module
Ignition
54 Power Moding (Immobilizer
Module, Ignition
Switch)
55 Intercooler Pump
56 Windshield Wipers Mini-Fuses Usage
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)
69 Body Control Module 6, Body
Control Module 7 Mini-Fuses Usage
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
J-Case Fuses Usage
6 Cooling Fan 2
7 Cooling Fan 1
8 Starter
Page 349 of 478

Black plate (49,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
Vehicle Care 10-49
J-CaseFuses Usage
9 Not Used
10 Antilock Brake System Motor
13 Not Used
14 Electric Parking Brake
15 Not Used
16 Not Used
17 Blower Motor
18 Rear Window Defogger
37 Magnetic Ride/ Suspension Control
Relays Usage 1 Cooling Fan 2
2 Cooling Fan 1
3 Starter Relays Usage
4 Rear Window Defogger
5 Instrument Panel Auxiliary Power
Outlet
12 Horn
20 Headlamp Washer (HID Only)
21 Cooling Fan (Series/ Parallel)
32 Air Conditioning Compressor Clutch
39 Not Used
42 Right Daytime Running Lamp
44 Left Daytime Running Lamp (HID)
45 Front Fog Lamps (HID Only)
48 High-Beam Headlamps Relays Usage
49 Low-Beam Headlamps (HID)
53 Not Used
63 Main Ignition
66 Windshield Wipers
67 Powertrain
68 Windshield Wipers High Speed
Rear Compartment Fuse
Block (CTS Coupe and
Sedan)
The rear compartment fuse block is
on top of the battery, on the right
side of the trunk. The battery access
door must be removed to access
the fuse block.
The vehicle may not be equipped
with all of the fuses, relays, and
features shown.
Page 353 of 478

Black plate (53,1)Cadillac CTS/CTS-V Owner Manual - 2013 - crc2 - 8/22/12
Vehicle Care 10-53
RelaysUsage
11 Sedan Trunk Release/Coupe
Rear Fog
(Export Only)
12 Side Marker Lamps
13 Left Position Lamps
Mini-Fuses Usage 14 Right Position Lamp
15 Left Position Lamp
16 Door Lock
17 Console/Auxiliary Power Outlet
18 Rear Fog/Export Body Control
Module
(Export Only)
19 Trunk Release
20 Easy Entry Seats (Coupe Only)
21 Fuel Pump Mini-Fuses Usage
22 Right Position Lamp (Export Only)
23 Regulated Voltage Control Sensor
24 Audio System (Radio)
25 Airbag System
26 Remote Keyless Entry/PASS-Key
®
Theft Deterrent
Module
27 Audio Speakers/ Subwoofer
28 OnStar
®System (If
Equipped)
29 Engine Control Module
30 Canister Vent
31 Rear Differential Cooling Pump
33 Stop Lamps (Export Only) Mini-Fuses Usage
34 Theft Deterrent System/Universal
Garage Door
Opener
35 Memory Seat Module
36 Passenger Door Module
38 Side Blind Zone Alert (Coupe Only)
39 Amplifier
Circuit
Breakers Usage
1 Driver Power Seat Switch
2 Passenger Power Seat Switch
3 Power Windows
4 Power Steering Column