INSTALLATION INSTRUCTIONS
HIGH OUTPUT RAD FAN ASSEMBLY
PART # 16817, 16820 & 16827
Please read these instructions completely before beginning installation
KIT CONTENTS
QTY. DESCRIPTION
1 Fan Shroud Assembly
4 Angle Brackets
1 Rubber Fan Shroud Seal
IMPORTANT
This fan assembly is designed for PULLER APPLICATIONS
ONLY Engine side of radiator. (See Diagram #1)
MOUNTING OPTIONS
QTY. DESCRIPTION
16 1/4-20 x 3/4” Hex Bolts
16 1/4-20 Lock Nuts
40 1/4” Flat Washers
TOOLS NEEDED
7/16” Open End Wrench
7/16” Socket and Ratchet
Wire Stripper
Wire Crimping Tool
Diagram #1
Puller Fan
Engine
Radiator
Air Flow
Diagram #2
Angle
Brackets
Diagram #3
Option 1
Flush Mount
Down Flow Radiator
Option 2
Recessed Mount
Cross Flow Radiator
Angle Brackets
Adjustment Range
Angle
Bracket
Rubber Seal
(Page 1)
Derale Performance, Los Angeles, CA 800.421.6288 www.derale.com
Angle
Bracket
Rubber Seal
3 3/4”
Adjustment
Range
16817-16820-16827-InstructionSheet
Revised-12/15/2011
INSTALLATION
1. Using a table or workbench, lay the Electric Fan Assembly on a flat surface, Electric Fan facing down.
2. Take the supplied Rubber Fan Shroud Seal and install it onto the bottom edge of the Fan Shroud Assembly.
(See Diagram #4)
3. Cut off any excess Rubber.
4. Identify the four Angel Brackets, 1/4-20 x 3/4” Hex Bolts, 1/4” Flat Washers & 1/4-20 Lock Nuts.
5. Attach the Angle Brackets to the Shroud using two bolts per bracket. (See Diagram #5)
In some applications where the radiator flange is not right up against the fan shroud, longer bolts can be used toNote:
space the Angle Brackets. (See Diagram #6) Hardware not included!
6. Position the Electric Fan Assembly against the radiator in the desired location.
7. Using the remaining 1/4-20 x 3/4” Hex Bolts, 1/4” Flat Washers & 1/4-20 Lock Nuts, attach the Electric Fan Shroud
Assembly to the radiator. (See Diagram #5)
In some cases the radiator flange may have to be drilled for proper alignment.Note:
Diagram #4
Fan Shroud
Assembly
Rubber Fan
Shroud Seal
Diagram #5
1/4” Bolt
Slotted
Holes
1/4” Flat Washer
Fan Shroud
Radiator
Flange
1/4” flat
Washers
1/4-20 x 3/4”
Hex Bolts
1/4” Flat Washer
1/4” Nyloc Nut
Diagram #6
OPTIONAL
MOUNTING
Angle
Bracket
Provided
Rubber Fan
Shroud Seal
Fan Shroud
WIRING OPTIONS
Switched - Utilizing an automotive rated thermostat or manual switch
There are a few options on how to activate (turn on) your new Electric Fan Assembly.
1. Manual Switch - Install a switch in the passenger compartment and turn on Electric Fan as desired.
2. Electric Fan Thermostat Switch
A. Adjustable Thermostat - Allows an adjustment range for you to determine optimal turn on temperature.
B. Pre Determined Temperature - Thermostat has a pre determined temp. from the factory that determines turn on temp.
Important: When purchasing a thermostat always consider the maximum amp draw. Some thermostats are not designed to
properly handle 25 amps.
Note: When installing the Electric Fan with a Thermostat always follow manufacturer's instructions for specific details. In some
cases you will not need the supplied relay harness.
(Page 2)
Derale Performance, Los Angeles, CA 800.421.6288 www.derale.com
WIRING INSTALLATION USING RELAY(S) (NOT SUPPLIED)
RED Wire - Attach to the Positive side of Battery (+)
BLACK Wire - Attach to a good Chassis ground (-)
ORANGE Wire - Attach to the BLUE Positive Electric Fan Lead (Fan +)
YELLOW Wire - Attach to (+) 12V Switched Power (Thermostat or Manual Switch)
GREEN Wire* - (OPTIONAL) Attach to the Positive feed from the A/C Clutch
*This wire will allow you to turn on the Electric Fan every time the vehicles air conditioning is turned on.
If you do not wish to use this option, please disregard the Green wire.
ELECTRIC FAN
BLUE Wire - (+) Positive Fan lead Attach to the ORANGE wire coming from the relay harness
BLACK Wire - ( )(-) Negative Fan Lead Attach to a good Chassis ground See Diagram #7
Diagram #7
Blue Wire (+)
Red
Orange
Relay
Yellow
Black
Green
Wiring Diagram Using Relays (Not Supplied)
NOTE: To confirm color of positive fan leads see Red/Silver
manufacturers label on the electric fan.
Relay
Fan
Black Wire (-)
To chassis ground (-)
To Positive (+) side of battery
To (+) 12V Switched Power
To ground (-)
To A/C clutch (+)
Orange
Fan (+)
Green/
Yellow
Switch (+)
Black
Ground (-)
87
87A
86 85
30
Red
Battery (+)
(Page 3)
Warning: Installation of accessories should only be undertaken by those with mechanical knowledge and are familiar with working on
vehicles. Always use eye protection (goggles, safety glasses or shield). Park the vehicle in a well lit area, on level ground and apply the
parking brake. Only work on a cold vehicle that has been sitting overnight, failure to do so will result in severe burns and injury. Before starting
the vehicle, make sure no tools or any other items are left under hood that could interfere with or be drawn into moving parts of the engine.
Failure to follow instructions can lead to severe damage and personal injury.
Derale Performance, Los Angeles, CA 800.421.6288 www.derale.com
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