
Wiring - Diagram C
Mandatory Connections
1. Connect the positive “+” terminal to a low amp 12 volt positive (+) source. (i.e. fuse box) using
thin red wire and fuse taps (if necessary) provided in the kit.
Note: Attach this wire to an ignition controlled source to stop the fan unit from operating when
the vehicle is shut off.
2. Connect the “B” terminal to a high amp 12 volt positive (+) power source. (i.e. battery, starter
solenoid) using the thick red wire and in line fuse holder provided in the kit (do not install the
fuse at this time).
3 Connect the “G” terminal to ground. (i.e. chassis, negative(-) side of battery) using the thick
black wire provided in the kit.
5. If you have air conditioning: with 3-way connector provided, pass theA/C clutch positive(+)
wire (connected to the A/C compressor) through the connector. Place the green wire provided
into the closed end of the connector. Crimp metal plate. Snap plastic cover into place. Attach
green wire to the "C" terminal of the control box.
Air Conditioning Relay activates fan whenA/C is turned on
6. Insert probe in radiator core near upper hose. Install rubber cap over end of probe..
Adjusting the Temeprature Control
1. Turn the adjustable control knob completely clockwise.
2. Idle the vehicle, when the vehicle is at 5 to 10 degrees higher than “normal” turn the adjustable
control knob counter clockwise until the fan comes on.
3. The fan will now activate at this temperature automatically and will shut off after it has cooled
the vehicle down 7 to 11 degrees. Note: It is typical for this fan unit to cycle on and off.
rev. 06-22-05 99925 page 2 of 2
*WARNING: If not using Flex-a-lite’s
illuminated switch (PN #31148), you must
disconnect the switch ground.
The Flex-a-lite Limited Warranty
Flex-a-liteConsolidated,7213-45thSt. Ct. E., Fife, WA98424,Telephone No. 253-922-2700, warrantstotheoriginalpurchasinguser,thatallFlex-a-liteproductstobefreeofdefects
in material and workmanship for a period of 365 days (1 year) fromdateofpurchase. Flex-a-lite productsfailing within 365 days (1 year) fromdateofpurchase may be returned to
the factorythroughthepointofpurchase,transportation chargesprepaid.If,oninspection,causeoffailure isdeterminedto bedefectivematerialorworkmanshipandnotbymisuse,
accidental or improperinstallation,Flex-a-litewill replacethefanfree ofcharge,transportation prepaid. Flex-a-lite will not be liable for incidental, progressive or consequential
damages.Somestatesdonotallowtheexclusionorlimitaionofincidentalorconsequentialdamages,sotheabovelimitationorexclusion may not apply to you.Thiswarranty 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 WarrantyAct of 1975.
Diagram C
Optional Connection—
*Illuminated Manual Switch
(Note: Based on Flex-a-lite’s manual switch
part # 31148, not included)
(this step is based on Flex-a-lite’s part #31148, other
swtches will cause this unit to fail)
1. Connect the “M” terminal to terminal 1
on the switch.
2. Connect terminal 2 to a 12 volt posi-
tive(+) source.
3. Attach terminal 3 to ground to illumi-
nate the switch.
B
CMG+
Ground
12 Volt Positive Source
12 Volt Positive
Source
Control Box
FuseHolder
Control Box Terminals & Connections
Mandatory Connections
+ 12 volt positive source
G Ground
B 12 volt positive source
C Air conditioning relay
Optional Connection
M Manual switch
12 Volt Source
12 3
Ground
(Illuminate switch)
A/C positive (+)
wire from clutch
3-way
connector
optional