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Radiator Support Channel or Frame Installation;
Attach frame mounting brackets to fan using the 4ea. - 3/4” plastic self tapping screws.
1.
Position fan to desired location and mark holes on radiator channels or frame.
2.
Rotate fan blades to ensure that they are free of obstructions.
3.
On the marked hole locations, drill 4ea. - 13/64” holes.
4.
Secure the fan to radiator using 4ea. - 1” hex head self tapping screws.
5.
Check again to be sure the fan blades rotate freely.
6.
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Wiring Instructions Model #412 & #432
thick black
colored
thick
black
yellow butt
connectors
thick black
colored
thick
black
yellow butt
connectors
FOLLOW THESE INSTRUCTIONS CAREFULLY TO AVOID DAMAGING THE CONTROL UNIT,
FAN MOTORS, AND YOUR VEHICLE! WHEN CRIMPING WIRES, ALWAYS USE A QUALITY
CRIMPING TOOL (DO NOT USE PLIERS OR OTHER DEVICES).
Step 1: Locate mounting point for control
Locate a mounting point for control near inlet side of radiator. Control needs to be placed within 18” of radiator
inlet hose. You may want to mount next to radiator on fender well. Mount control using screws provided.
Note: If you have purchased a model #412 fan, proceed to step 2a; If you have purchased a model #432 fan,
skip step 2a and proceed to step 2b.
Step 2a: Wire the fan motors, for model #412 (refer to Wiring Diagram, below)
Using the yellow butt connectors provided, attach a length of the large diameter (12 AWG) red wire to the colored motor wires at fan. Attach a length of the large diameter (12 AWG) black wire to the black motor wires at
the fan. Once the fan is in place, these will attach to the control module. If mounting the control somewhere in
the engine compartment, leave enough wire to reach the control module, but do not connect yet.
WIRING DIAGRAM - MODEL #412 (PULLER)
Step 2b: Wire the fan motors, for model #432 (refer to Wiring Diagram, below)
Using the yellow butt connectors provided, attach a length of the large diameter (12 AWG) red wire to the black
motor wires at fan. Attach a length of the large diameter (12 AWG) black wire to the colored motor wires at the
fan. Once the fan is in place, these will attach to the control module. If mounting the control somewhere in the
engine compartment, leave enough wire to reach the control module, but do not connect yet.
WIRING DIAGRAM - MODEL #432 (PUSHER)
Step 3: Connect the motor wires to the control module
(Red wire to the “M+” terminal and black wire to the “M-” terminal).
Step 4: Disconnect the negative battery lead for safety while finishing the wiring. Use the large diameter red
(12 AWG) wire to run power directly from the battery positive (+) terminal to the “B” terminal on the control
module. Connect the fuse holder in-line with this wire, as shown, but do not insert the fuse yet. Use the blue
female, ring, and butt connectors provided.
Step 5: Use the large diameter black (12 AWG) wire to run from the negative (-) battery terminal to the “G”
terminal on the control module. Use the blue female connector and ring connector provided.
CONTINUE TO NEXT PAGE
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WIRING INSTRUCTIONS CONTINUED
Step 6: Use the small diameter red wire (18 AWG) to connect the “+” terminal on the control module to a positive power source. NOTE: Attaching this wire to an ignition-controlled source will shut off the fan when
the engine is turned off. Attach this wire to an uninterrupted (always hot) power source to allow the fan
to continue running after the engine is shut off. Use the blue female connector and fuse taps (included) if
necessary.
Step 7: (Optional) For air conditioning control (if desired) connect the “C” terminal on the control module to the
positive wire that triggers the A/C compressor using the small diameter green (14 AWG) wire. Using a voltmeter, determine which wire coming from the compressor is the positive trigger wire. Use the blue “tap-in connector” (included) to tap into this wire and send a signal to the fan control module. The fan will cycle on and off
with the A/C clutch when the A/C is turned on.
Step 8: (Optional) For manual switch operation, use Flex-a-lite part #31148. Connect the switch as shown on
the wiring diagram (previous page). Connect the “M” terminal on the control module to the “1” terminal on the
switch. Connect the “2” terminal on the switch to a positive 12v power source. Connect terminal “3” on the
switch to a good ground (for switch illumination). NOTE: To prevent thermostatic activation (if only manu-
al switch operation is desired), omit the lead to the “+” terminal of the control box. “B”, “G”, “M+” and
“M-” must remain connected. If not using a Flex-a-lite manual switch, do not connect a ground wire to
the switch!
Use the zip ties provided to secure the wires and prevent them from interfering with fan blades, belts, and pulleys in the engine compartment. Reconnect the battery and insert the fuse provided.
Step 9: Insert the temperature probe into the radiator fins
Install temp. probe near inlet hose... then replace the insulator cap.
Locate the inlet hose from the engine to the radiator. Remove the black insulator cap and insert the temp.
probe through the radiator fins near the inlet hose. Reinstall the black insulator cap.
Step 10: Adjust the temperature control knob on the control box
If you disconnected any hoses or drained coolant to install the fan, reconnect the hoses and refill the radiator.
Press the control knob (included in wiring kit) onto the control box shaft. Turn the knob clockwise until it stops.
Start the engine and allow it to idle. Using a digital thermometer (positioned near the inlet hose) or the vehicle’s temperature gauge, monitor the temperature. When the coolant temp. is slightly above normal (or desired
temp.), turn the knob counter-clockwise just until the fan turns on. From now on, the fan should activate at this
temperature setting. Adjust as necessary to maintain desired temperature.
The Flex-a-lite Limited Warranty
Flex-a-lite Consolidated, 7213-45th St. Ct. E. Fife, WA 98424, Telephone No. 253-922-2700, warrants to the original purchasing user, that all Flex-a-lite products to be free of
defects in material and workmanship for a period of 365 days (1 year) from date of purchase. Flex-a-lite products failing within 365 days (1 year) from date of purchase may
be returned to the factory through the point of purchase, transportation charges prepaid. If, on inspection, cause of failure is determined to be defective material or workmanship and not by misuse, accidental or improper installation, Flex-a-lite will replace the fan free of charge, transportation prepaid. Flex-a-lite will not be liable for incidental,
progressive or consequential damages. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may
not apply to you. This warranty gives you specific legal rights and you may have other rights, which vary from state to state.
The Flex-a-lite warranty is in compliance with the Magnuson-Moss Warranty Act of 1975.
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