Wiring Harness
Installation
Instructions
Dual Electric Fan Wiring Kit
Dual Electric Fan Wiring Harness with Temperature Sending Unit and 40 Amp Waterproof Relays
Be Cool Part Numbers:
#75100 - Temperature Sending Unit Turns Fans on at 210˚, off at 190˚
#75117 - Temperature Sending Unit Turns Fans on at 195˚, off at 175˚
#75104 - Temperature Sending Unit Turns Fans on at 185˚, off at 165˚
Kit Contents for #75100, #75117, or #75104:
• 2 Harnesses with Relays, Sockets, and Fuse Holders
• #75099 Temperature Sending Unit (for kit #75100)
• #75030 Temperature Sending Unit (for kit #75117)
• #75029 Temperature Sending Unit (for kit #75104)
• Butt and Eyelet Connectors
• Shrink Tubing
See page 5 for installation instructions, pages 6 & 7 for wiring diagrams for
See page 5 for installation instructions and pages 6 & 7 for wiring diagrams for
vehicles without air conditioning, and pages 8 & 9 for vehicles with air conditioning.
vehicles without air conditioning and pages 8 & 9 for vehicles with air conditioning.
Page 2
Kit Contents
Single Electric Fan Wiring Kit
Single Electric Fan Wiring Harness with Temperature Sending Unit and 40 Amp Waterproof Relay
Be Cool Part Numbers:
#75098 - Temperature Sending Unit Turns Fan on at 210˚, off at 190˚
#75021 - Temperature Sending Unit Turns Fan on at 195˚, off at 175˚
#75032 - Temperature Sending Unit Turns Fan on at 185˚, off at 165˚
#75017 - Wiring Kit with no Temperature Sending Unit
Kit Contents for #75017, #75021, #75032, or #75098:
• Harness with Relay, Socket, and Fuse Holder • #75029 Temperature Sending Unit (for kit #75032)
• #75030 Temperature Sending Unit (for kit #75021) • #75099 Temperature Sending Unit (for kit #75098)
• Butt and Eyelet Connectors • Shrink Tubing
See page 5 for installation instructions and pages 6 & 7 for wiring diagrams for
See page 5 for installation instructions, pages 6 & 7 for wiring diagrams for
vehicles without air conditioning and pages 8 & 9 for vehicles with air conditioning.
vehicles without air conditioning, and pages 8 & 9 for vehicles with air conditioning.
Page 3
Overview
Dual & Single Electric Fan Wiring Kits
Design Intent:
• These wiring harness kits are designed to enable a simple and dependable installation for high performance electric
fan(s).
• They are compatible with all vehicles and can be used on any positive or negative ground 12 volt DC vehicle with no
modications.
• The wiring harness is protected by many weatherproof components. However, care should be taken to position the devices where they will be as dry as possible and the least exposed to extreme temperatures.
Installation of the Temperature Sending Unit:
• DO NOT attempt installation when the engine is hot.
• The temperature sending unit is designed to mount in the intake manifold for the most accurate control of the system.
• The switch has 3/8”-18 N.P.T threads and will work in many applications. A 1/2” N.P.T. adapter is included in the kit if larger
threads are needed for this switch installation.
• DO NOT use “Teon” style tape on the temperature sending unit as this could cause a poor electrical ground and improper
operation.
• If you need to cut and splice the wires, use the provided butt connectors and shrink tubing for a proper connection.
See page 5 for installation instructions and pages 6 & 7 for wiring diagrams for
See page 5 for installation instructions, pages 6 & 7 for wiring diagrams for
vehicles without air conditioning and pages 8 & 9 for vehicles with air conditioning.
vehicles without air conditioning, and pages 8 & 9 for vehicles with air conditioning.
Page 4
Installation Instructions
Dual & Single Elecric Fan Wiring Kits
DISCONNECT BATTERY before any mechanical or electrical installation.
Mount the relay in a dry position on the vehicle. When this is completed, connect the wires as per the diagram.
Red Wire:
Gray Wire: Connect the gray wire from the relay to the temperature sending unit using the enclosed eyelet connector.
Orange Wire/Fuse: Connect the eyelet end on the fuse holder assembly to the positive battery terminal.
Green Wire: Connect the green wire from the relay to the ignition terminal in fuse box.
For air conditioned vehicles, use Be Cool Kit #75095. When air conditioning is activated, fans will turn on regardless of engine
temperature.
Wiring Instructions for Optional A/C Wiring Harness Kit Be Cool Part #75095
Blue Wire: Connect the blue wire to the blue wire on the A/C compressor power input with butt connector.
Gray Wire: Connect the gray wire from the relay to the temperature sending unit using the enclosed eyelet connector.
Black Wire: Connect the black wire to the eyelet connector, and then to the chassis ground.
Op ti on al ---------->
Plug the red and black wires (with white plastic plug) from the relay to the white plastic plug on the fan harness.
Connect a high amp toggle switch (Be Cool Kit #75096) to the temperature sending unit’s gray wire. This will
close the circuit when the switch (SPST; Single Pole, Single Throw) is on.
Page 5
Page 4
Dual Fan
Fuse
Box
Page 4
Design Intent:
• These optional high amp toggle switch harness kits are designed to enable simple installation of high performance elec-
tric fan(s).
• It is a universal t. It can be used on any positive or negative ground 12 volt DC vehicle.
• These switches can be used with or without a temperature sending unit using the diagram on pages 17 & 18.
• The wiring harness is protected by many weatherproof components. However, care should be taken to position the de-
vice where it will be as dry as possible and the least exposed to extreme temperatures.
Theory of Operation:
• When the temperature sending unit reaches its operating temperature it brings the attached wire to ground.
• When this happens the relay is “turned on” which, in turn, operates the electric fan(s).
• These manual high amp toggle switches serve as a bypass to the temperature sending unit and will operate the fans at
your desired temperature.
Installation of the High Amp Toggle Switches:
• DO NOT attempt installation when the engine is hot.
• Disconnect the battery before installing wiring.
• If you need to cut and splice the wires, use the provided butt connectors and shrink tubing for a proper connection.
See page 16 for installation instructions and pages 17 & 18 for a wiring diagram.
Page 4
Design Intent:
• These optional high amp toggle switch harness kits are designed to enable simple installation of high performance elec-
tric fan(s).
• It is a universal t. It can be used on any positive or negative ground 12 volt DC vehicle.
• These switches can be used with or without a temperature sending unit using the diagram on pages 17 & 18.
• The wiring harness is protected by many weatherproof components. However, care should be taken to position the de-
vice where it will be as dry as possible and the least exposed to extreme temperatures.
Theory of Operation:
• When the temperature sending unit reaches its operating temperature it brings the attached wire to ground.
• When this happens the relay is “turned on” which, in turn, operates the electric fan(s).
• These manual high amp toggle switches serve as a bypass to the temperature sending unit and will operate the fans at
your desired temperature.
Installation of the High Amp Toggle Switches:
• DO NOT attempt installation when the engine is hot.
• Disconnect the battery before installing wiring.
• If you need to cut and splice the wires, use the provided butt connectors and shrink tubing for a proper connection.
See page 16 for installation instructions and pages 17 & 18 for a wiring diagram.
Dual Fan
Wiring
Diagram
For Vehicles
WITHOUT
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75100 w/Sending Unit
#75117 w/Sending Unit
#75104 w/Sending Unit
Fuse
Box
Wiring
Diagram
For Vehicles
WITHOUT
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75100 w/Sending Unit
#75117 w/Sending Unit
#75104 w/Sending Unit
Fuse
Box
Page 6
Page 7
Single
Fan Wiring
Fuse
Box
Page 7
Single
Fan Wiring
Diagram
For Vehicles
WITHOUT
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75017 w/o Sending Unit
#75021 w/Sending Unit
#75032 w/Sending Unit
#75098 w/Sending Unit
Fuse
Box
Page 7
Fuse
Box
Diagram
For Vehicles
WITHOUT
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75017 w/o Sending Unit
#75021 w/Sending Unit
#75032 w/Sending Unit
#75098 w/Sending Unit
Fuse
Box
A/C
Wiring
Harness
Diagram
Wiring Diagram
for Be Cool Kit
Part Number:
#75095
Page 8
Dual Fan
Wiring
Diagram
For Vehicles WITH
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75100 w/Sending Unit
#75117 w/Sending Unit
#75104 w/Sending Unit
With A/C Wiring
Harness Kit Part #75095
Fuse
Box
Page 8
Fuse
Box
Dual Fan
Wiring
Diagram
For Vehicles WITH
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75100 w/Sending Unit
#75117 w/Sending Unit
#75104 w/Sending Unit
With A/C Wiring
Harness Kit Part #75095
Fuse
Box
Vehicles originally equipped
with (factory air-conditioning)
use Be Cool air conditioning
harness 75095
Dual Fan
Wiring
Diagram
Vehicles with (aftermarket
air-conditioning) contact
Manufacture for proper
recommendation.
For Vehicles WITH
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75100 w/Sending Unit
#75117 w/Sending Unit
#75104 w/Sending Unit
With A/C Wiring
Harness Kit Part #75095
Fuse
Box
Page 8
Page 7
Page 9
Single Fan
Wiring
Diagram
For Vehicles WITH
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75017 w/o Sending Unit
#75021 w/Sending Unit
#75032 w/Sending Unit
#75098 w/Sending Unit
With Air Conditioning
Harness Part Number #75095
Fuse
Box
Page 7
Fuse
Box
Page 9
Single Fan
Wiring
Diagram
For Vehicles WITH
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75017 w/o Sending Unit
#75021 w/Sending Unit
#75032 w/Sending Unit
#75098 w/Sending Unit
With Air Conditioning
Harness Part Number #75095
Fuse
Box
Page 9
Single Fan
Wiring
Diagram
For Vehicles WITH
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75017 w/o Sending Unit
#75021 w/Sending Unit
#75032 w/Sending Unit
#75098 w/Sending Unit
With Air Conditioning
Fuse
Box
Vehicles originally equipped
with (factory air-conditioning)
use Be Cool air conditioning
harness 75095
Single Fan
Wiring
Diagram
For Vehicles WITH
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75017 w/o Sending Unit
#75021 w/Sending Unit
#75032 w/Sending Unit
#75098 w/Sending Unit
With Air Conditioning
Harness Part Number #75095
Fuse
Box
Vehicles with (aftermarket
air-conditioning) contact
Manufacture for proper
recommendation.
Kit Contents
Electric Fan A/C Wiring Harness Kits
Electric Fan Air Conditioning Wiring Harness Kit with 40 Amp Waterproof Relay
Be Cool Part:
#75095
Kit Contents for #75095:
• Weatherproof Relay and Socket
• Wire Terminated at the Relay
• Butt and Eyelet Connectors
See page 12 for installation instructions and page 13 for a wiring diagram.
Page 10
Overview
Electric Fan A/C Wiring Harness Kit
Design Intent:
• This kit is designed to operate electrical fan(s) in conjunction with an air conditioning system.
• To prevent damage to the A/C system the electric fan(s) should move air through condenser when the A/C is turned on.
• It is compatible with all vehicles and wiring harnesses. It can be used on a positive or negative ground 12 volt DC vehicle.
• This kit can be used with Be Cool Wiring Harness Kits #75021, #75032, #75098, #75100, #75117, or #75104.
• The wiring harness is protected by many weatherproof components. However, care should be taken to position the device where it will be as dry as possible and the least exposed to extreme temperatures.
Theory of Operation:
• The relay is actuated by power to the air conditioning compressor.
• When the relay is actuated one set of contacts closes the circuit to bypass the temperature sending unit.
See page 12 for installation instructions and page 13 for wiring diagram.
Page 11
Page 7
Page 7
Fuse
Box
Page 9
Single Fan
Wiring
Diagram
For Vehicles WITH
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75017 w/o Sending Unit
#75021 w/Sending Unit
#75032 w/Sending Unit
#75098 w/Sending Unit
With Air Conditioning
Harness Part Number #75095
Fuse
Box
Page 9
Single Fan
Wiring
Diagram
For Vehicles WITH
Air Conditioning
Wiring Diagram
for Be Cool Kit
Part Numbers:
#75017 w/o Sending Unit
#75021 w/Sending Unit
#75032 w/Sending Unit
#75098 w/Sending Unit
With Air Conditioning
Fuse
Box
Installation Instructions
Electric Fan A/C Wiring Harness Kit
DISCONNECT BATTERY before mechanical or electrical installation.
Mount the relay in a dry position on the vehicle. When this is completed, connect the wires as per the diagram.
Blue Wire: Connect the blue wire to the blue wire on the A/C compressor power input with butt connector.
Gray Wire:
Black Wire: Connect the black wire to the eyelet connector and then to the chassis ground.
Connect the gray wire from the relay to the temperature sending unit using the enclosed eyelet connector.
Page 12
A/C
Wiring
Harness
Diagram
Wiring Diagram
for Be Cool Kit
Part Number:
#75095
Page 13
A/C
Wiring
Harness
Diagram
Wiring Diagram
for Be Cool Kit
Part Number:
#75095
Page 13
A/C
Wiring
Harness
Diagram
Wiring Diagram
for Be Cool Kit
Part Number:
#75095
Page 13
A/C
Wiring
Harness
Diagram
Wiring Diagram
for Be Cool Kit
Part Number:
#75095
A/C
Wiring
Harness
Diagram
Wiring Diagram
for Be Cool Kit
Part Number:
#75095
Page 13
Page 7
Fan Wiring
Fuse
Box
Page 7
Fuse
Box
Kit Contents
High Amp Electric Fan Toggle Switch Kits
High Amp Toggle Switch Wiring Harness with 40 amp Relay for use with Single or
Dual Electric Fans
Be Cool Part: #75196
Kit Contents for #75196:
• High Amp Toggle Switch with Wires
• Relay, Socket, and Fuse Holder
• Fan Harness
• Wire Sleeve and Shrink Tubing
• Butt and Eyelet Connectors
High Amp Toggle Switch with Wiring for use with Single or Dual Electric Fans
Be Cool Part: #75096
Kit Contents for #75096:
• High Amp Toggle Switch with Wires
• Wire Sleeve
• Eyelet Connectors
#75096 #75017
#75096
See page 16 for installation instructions and pages 17 & 18 for wiring diagrams.
Page 14
Design Intent:
• These optional high amp toggle switch harness kits are designed to enable simple installation of high performance elec-
tric fan(s).
• It is a universal t. It can be used on any positive or negative ground 12 volt DC vehicle.
• These switches can be used with or without a temperature sending unit using the diagram on pages 17 & 18.
• The wiring harness is protected by many weatherproof components. However, care should be taken to position the de-
vice where it will be as dry as possible and the least exposed to extreme temperatures.
Theory of Operation:
• When the temperature sending unit reaches its operating temperature it brings the attached wire to ground.
• When this happens the relay is “turned on” which, in turn, operates the electric fan(s).
• These manual high amp toggle switches serve as a bypass to the temperature sending unit and will operate the fans at
your desired temperature.
Installation of the High Amp Toggle Switches:
• DO NOT attempt installation when the engine is hot.
• Disconnect the battery before installing wiring.
• If you need to cut and splice the wires, use the provided butt connectors and shrink tubing for a proper connection.
See page 16 for installation instructions and pages 17 & 18 for a wiring diagram.
Page 17
Design Intent:
• These optional high amp toggle switch harness kits are designed to enable simple installation of high performance elec-
tric fan(s).
• It is a universal t. It can be used on any positive or negative ground 12 volt DC vehicle.
• These switches can be used with or without a temperature sending unit using the diagram on pages 17 & 18.
• The wiring harness is protected by many weatherproof components. However, care should be taken to position the de-
vice where it will be as dry as possible and the least exposed to extreme temperatures.
Theory of Operation:
• When the temperature sending unit reaches its operating temperature it brings the attached wire to ground.
• When this happens the relay is “turned on” which, in turn, operates the electric fan(s).
• These manual high amp toggle switches serve as a bypass to the temperature sending unit and will operate the fans at
your desired temperature.
Installation of the High Amp Toggle Switches:
• DO NOT attempt installation when the engine is hot.
• Disconnect the battery before installing wiring.
• If you need to cut and splice the wires, use the provided butt connectors and shrink tubing for a proper connection.
See page 16 for installation instructions and pages 17 & 18 for a wiring diagram.
Page 17
Page 15
Design Intent:
• These optional high amp toggle switch harness kits are designed to enable simple installation of high performance elec-
tric fan(s).
• It is a universal t. It can be used on any positive or negative ground 12 volt DC vehicle.
• These switches can be used with or without a temperature sending unit using the diagram on pages 17 & 18.
• The wiring harness is protected by many weatherproof components. However, care should be taken to position the de-
vice where it will be as dry as possible and the least exposed to extreme temperatures.
Theory of Operation:
• When the temperature sending unit reaches its operating temperature it brings the attached wire to ground.
• When this happens the relay is “turned on” which, in turn, operates the electric fan(s).
• These manual high amp toggle switches serve as a bypass to the temperature sending unit and will operate the fans at
your desired temperature.
Installation of the High Amp Toggle Switches:
• DO NOT attempt installation when the engine is hot.
• Disconnect the battery before installing wiring.
• If you need to cut and splice the wires, use the provided butt connectors and shrink tubing for a proper connection.
See page 16 for installation instructions and pages 17 & 18 for a wiring diagram.
Page 17
Overview
High Amp Electric Fan Toggle Switch Kits
Design Intent:
• These optional high amp toggle switch harness kits are designed to enable simple installation of high performance electric fan(s).
• It is a universal t. It can be used on any positive or negative ground 12 volt DC vehicle.
• These switches can be used with or without a temperature sending unit using the diagram on pages 17 & 18.
• The wiring harness is protected by many weatherproof components. However, care should be taken to position the device where it will be as dry as possible and the least exposed to extreme temperatures.
Theory of Operation:
• When the temperature sending unit reaches its operating temperature it brings the attached wire to ground.
• When this happens the relay is “turned on” which, in turn, operates the electric fan(s).
• These manual high amp toggle switches serve as a bypass to the temperature sending unit and will operate the fans at
your desired temperature.
Installation of the High Amp Toggle Switches:
• DO NOT attempt installation when the engine is hot.
• Disconnect the battery before installing wiring.
• If you need to cut and splice the wires, use the provided butt connectors and shrink tubing for a proper connection.
See page 16 for installation instructions and pages 17 & 18 for a wiring diagram.
Page 15
Installation Instructions
High Amp Electric Fan Toggle Switch Kits
DISCONNECT BATTERY before any mechanical or electrical installation.
Mount the relay in a dry position on the vehicle. When this is completed, connect the wires as per the diagram.
Wiring Instructions for Be Cool Kit Part #75196 (Follow all instructions)
Red Wire:
Gray Wire: Connect the gray wire from the relay to the temperature sending unit using the enclosed eyelet connector.
Orange Wire/Fuse: Connect the eyelet end on the fuse holder assembly to the positive battery terminal.
Green Wire: Connect the green wire from the relay to the ignition terminal in fuse box.
Wiring Instructions for Be Cool Kit Part #75096
Gray Wire: Connect the gray wire from the relay to the temperature sending unit using the enclosed butt connector.
Black Wire: Connect the black wire to the eyelet connector and then to the chassis ground.
Instructions:
Plug the red and black wires (with white plastic plug) from the relay to the white plastic plug on the fan harness.
Connect a high amp toggle switch (Be Cool Kit #75096) to the temperature sending unit’s gray wire. This will
close the circuit when the switch (SPST; Single Pole, Single Throw) is on.
Page 16
Toggle
Switch
Wiring
Diagram
Wiring Diagram
for Be Cool Kit
Part Number:
#75196 w/Wiring Harness
Fuse
Box
Page 17
Toggle
Switch
Wiring
Diagram
Wiring Diagram
for Be Cool Kit
Part Number:
#75096 Toggle Switch
Page 18
AccessoriesKit Contents
Make sure your alternator has
a minimum of 100 AMPS
at idle to maintain a consistent
14.2 volts.
185˚/165˚ 195˚/175˚ 210˚/190˚
This will ensure your
75022 75029 75030 75099
electric fans are operating
at maximum efficiency.
Electric Fan Temperature Sending Units Part Number
Electric Fan Temperature Sending Unit 3/8” to 1/2” N.P.T. to Turn On at 185 Degrees and Turn Off at 165 Degrees 75029
Electric Fan Temperature Sending Unit 3/8” to 1/2” N.P.T. to Turn On at 195 Degrees and Turn Off at 175 Degrees 75030
Electric Fan Temperature Sending Unit 3/8” to 1/2” N.P.T. to Turn On at 210 Degrees and Turn Off at 190 Degrees 75099
Electric Fan Relays
40 Amp Replacement Waterproof Relay 75022
Electric Fan Connectors
Weatherhead Pigtail Connector, for #75066, #75068, and/or #75069 Electric Fans 75071
Electric Fan Standard Pigtail Connector 75221
Page 19
Be Cool Incorporated
Phone: 989-895-9699
Fax: 989-892-9213
Technical Support: 800-691-2667
America’s Leader In
903 Woodside Avenue, Essexville, Michigan 48732
www.becool.com
Power Cooling
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