Page 253 of 368

Cadillac ELR Owner Manual (GMNA-Localizing-U.S/Canada-9087644) -
2016 - crc - 9/17/15
252 Vehicle Care
How to Add Coolant to the
Coolant Surge Tank
{Warning
You can be burned if you spill
coolant on hot engine parts.
Coolant contains ethylene glycol
and it will burn if the engine parts
are hot enough. Do not spill
coolant on a hot engine.
Caution
This vehicle has a specific
coolant fill procedure. Failure to
follow this procedure could cause
the engine to overheat and be
severely damaged.
{Warning
The electric fans under the hood
can start up even when the
engine is not running and can(Continued)
Warning (Continued)
cause injury. Keep hands,
clothing, and tools away from any
underhood electric fan.
{Warning
Steam and scalding liquids from a
hot cooling system can blow out
and burn you badly. They are
under pressure, and if you turn
the surge tank pressure
cap—even a little —they can
come out at high speed. Never
turn the cap when the cooling
system, including the surge tank
pressure cap, is hot. Wait for the
cooling system and surge tank
pressure cap to cool if you ever
have to turn the pressure cap.
If coolant is needed, add the proper
DEX-COOL coolant mixture at the
coolant surge tank.
The coolant surge tank pressure
cap can be removed when the
cooling system, including the surge
tank pressure cap and upper
radiator hose, is no longer hot. 1. Turn the pressure cap slowly counterclockwise. If a hiss is
heard, wait for that to stop.
A hiss means there is still
some pressure left.
2. Keep turning the cap and remove it.
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Page 259 of 368

Cadillac ELR Owner Manual (GMNA-Localizing-U.S/Canada-9087644) -
2016 - crc - 9/17/15
258 Vehicle Care
Caution
The vehicle is equipped with an
AGM/VRLA 12-volt battery, which
can be damaged by using the
incorrect type of trickle charger.
An AGM/VRLA-compatible
charger must be used, with the
appropriate setting selected.
Follow the trickle charger
manufacturer instructions.
After the battery cable is
reconnected, it is possible that the
vehicle may not operate in Electric
Mode. If this happens, the high
voltage battery may need to be
charged.
Electric Drive Unit Shift
Lock Control Function
Check
{Warning
When you are doing this
inspection, the vehicle could
move suddenly. If the vehicle
moves, you or others could be
injured.
1. Before starting this check, be sure there is enough room
around the vehicle. It should be
parked on a level surface.
2. Firmly apply the parking brake. See Electric Parking
Brake 0195.
Be ready to apply the regular
brake immediately if the vehicle
begins to move.
3. With the vehicle off and the brake not applied, press and
hold POWER
Ofor more than
five seconds to place the
vehicle in Service Only Mode. See
Power Button 0182.
Without applying the regular
brake, try to move the shift
lever out of P (Park) with
normal effort. If the shift lever
moves out of P (Park), contact
your dealer for service.
Park Brake and P (Park)
Mechanism Check
{Warning
When you are doing this check,
the vehicle could begin to move.
You or others could be injured
and property could be damaged.
Make sure there is room in front
of the vehicle in case it begins to
roll. Be ready to apply the regular
brake at once should the vehicle
begin to move.
Park on a fairly steep hill, with the
vehicle facing downhill. Keeping
your foot on the regular brake, set
the Electric Parking Brake (EPB).
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Page 261 of 368

Cadillac ELR Owner Manual (GMNA-Localizing-U.S/Canada-9087644) -
2016 - crc - 9/17/15
260 Vehicle Care
Headlamp Aiming
Headlamp aim has been preset and
should need no further adjustment.
If the vehicle is damaged in a crash,
the headlamp aim may be affected.
If adjustment to the headlamps is
necessary, see your dealer.
Bulb Replacement
For the proper type of replacement
bulbs, seeReplacement
Bulbs 0261.
For any bulb-changing procedure
not listed in this section, contact
your dealer.
LED Lighting
This vehicle has several LED lamps.
For replacement of any LED lighting
assembly, contact your dealer.
Back-Up Lamps
1. Back-Up Bulb Socket 2. Back-Up Lamp Assembly
To replace one of these bulbs:
1. Reach under the rear fascia and locate the back-up lamp
assembly.
2. Remove the bulb socket (1) by turning counterclockwise and
pulling straight out of the lamp
assembly (2).
3. Pull the bulb out of the socket.
4. Install the new bulb in the bulb socket.
5. Install the bulb socket by turning clockwise.
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Page 262 of 368
Cadillac ELR Owner Manual (GMNA-Localizing-U.S/Canada-9087644) -
2016 - crc - 9/17/15
Vehicle Care 261
License Plate Lamp
Lamp Assembly
Bulb Assembly
1. Bulb Socket2. Bulb
3. Lamp Assembly
To replace one of these bulbs:
1. Push the lamp assembly (3) toward the right.
2. Pull the lamp assembly down to remove.
3. Turn the bulb socket (1) counterclockwise to remove it
from the lamp assembly (3).
4. Pull the bulb (2) straight out of the bulb socket (1).
5. Push the replacement bulb straight into the bulb socket
and turn the bulb socket
clockwise to install it into the
lamp assembly.
6. Push the lamp assembly back into position until the release
tab locks into place.
Replacement Bulbs
Lamp Bulb
Number
Back-Up Lamp 921 (W16W)
License
Plate Lamp W5W LL
For replacement bulbs not listed
here, contact your dealer.
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Page 263 of 368

Cadillac ELR Owner Manual (GMNA-Localizing-U.S/Canada-9087644) -
2016 - crc - 9/17/15
262 Vehicle Care
Electrical System
High Voltage Devices and
Wiring
{Warning
Exposure to high voltage can
cause shock, burns, and even
death. The high voltage
components in the vehicle can
only be serviced by technicians
with special training.
High voltage components are
identified by labels. Do not
remove, open, take apart,
or modify these components.
High voltage cable or wiring has
orange covering or labels. Do not
probe, tamper with, cut, or modify
high voltage cable or wiring.
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
the following in the vehicle:
.
Headlamp Wiring
. Windshield Wiper Motor
. Power Windows and other
Power Accessories
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 the wiper control is turned off.
After removal of the blockage, the
wiper motor will restart when the
control is then moved to the desired
operating position.
Although the circuit is protected
from electrical overload, overload
due to heavy snow or ice, may
cause wiper 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.
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Page 264 of 368
Cadillac ELR Owner Manual (GMNA-Localizing-U.S/Canada-9087644) -
2016 - crc - 9/17/15
Vehicle Care 263
Engine Compartment
Fuse Block
To open the fuse block cover, press
the clips at the front and back and
rotate the cover up to the side.
Caution
Spilling liquid on any electrical
component on the vehicle may
damage it. Always keep the
covers on any electrical
component.
Engine Compartment Fuse Block
A fuse puller is in the engine
compartment fuse block.
The vehicle may not be equipped
with all of the fuses, relays, and
features shown. Mini
Fuses Amps Usage
1 15A Engine control module/
Switched
power
2 7.5A Emissions
3 –Empty
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Page 265 of 368

Cadillac ELR Owner Manual (GMNA-Localizing-U.S/Canada-9087644) -
2016 - crc - 9/17/15
264 Vehicle Care
Mini
Fuses Amps Usage
4 15A Ignition coils/ Injectors
5 10A Column lock
6a –Empty
6b –Empty
7 –Empty
8 –Empty
9 7.5A Heated mirrors
10 5A Air conditioning control module
11 7.5A Traction power control
12 –Empty
13 10A Cabin heater pump and
valve
14 –Power
sounder/
Intrusion
inclination Mini
Fuses Amps Usage
15 15A Traction power inverter
module and
transmission
control module/
Battery
17 5A Engine control module/Battery
22 10A Left high-beam headlamp
24 –Empty
25 –Empty
26 –Empty
31 5A Adaptive cruise control/Auto
headlamp
32 5A Run/Crank for vehicle
integration
module
33 10A Run/Crank for heated
steering wheel Mini
Fuses Amps Usage
34 10A Vehicle integration
control module/
Battery
35 –Empty
36 10A Power electronics
coolant pump
37 5A Cabin heater control module
38 10A Rechargeable energy storage
system (high
voltage
battery)
coolant pump
39 10A Rechargeable energy storage
system (high
voltage
battery) control
module
40 10A Front windshield
washer pump
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Page 266 of 368

Cadillac ELR Owner Manual (GMNA-Localizing-U.S/Canada-9087644) -
2016 - crc - 9/17/15
Vehicle Care 265
Mini
Fuses Amps Usage
41 10A Right high-beam
headlamp
46 –Empty
47 –Empty
49 –Empty
50 10A Run/Crank/ Rear vision
camera/
Accessory
power module/
Tire pressure
monitoring
module
51 7.5A Run/Crank for ABS/Aero
Shutter/VITM
52 5A Engine control module/
Transmission
control module/
Run/Crank Mini
Fuses Amps Usage
53 7.5A Traction power inverter
module/Run/
Crank
54 7.5A Run/Crank/ Fuel system
control module/
Air conditioning
control module/
On board
charger/
Instrument
cluster/
Automatic
occupant
sensing/Mirrors
J-Case Fuses Amps Usage
16 –Empty
18 30A Rear defogger/ Lower grid
19 30A Front power window
20 –Empty J-Case
Fuses Amps Usage
21 30A Antilock brake system
electronic
control unit
23 –Empty
27 –Empty
28 –Empty
29 30A Front wipers
30 60A Antilock brake system motor
42 30A Right engine cooling fan
43 30A Front wipers
44 40A Charger
45 –Empty
48 30A Left engine cooling fan 1
Mini Relays Usage 3 Powertrain
4 Heated mirrors/Rear defogger
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