Page 4
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 de-
vices 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
vehicles without air conditioning and pages 8 & 9 for vehicles with air conditioning.
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 6
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
Page 17
Toggle
Switch
Wiring
Diagram
Wiring Diagram
for Be Cool Kit
Part Number:
#75196 w/Wiring Harness
Fuse
Box
Overview
Dual & Single Electric Fan Wiring Kits
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.
115304 BeCool Wiring Harness Text.indd 2 1/11/19 11:03 AM
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