Flex-a-Lite 51008 Jeep CJ Radiator Only Kit: Left hand inlet: GM V8 conversion. Kit Fits 1972-1986 Jeep CJs - Manual (Page 3)

Wiring the Fan:
Radiator and Fan Combo #51168 & #51169 only
Rev. 01-13-12 54988 Page 3 of 4
Connect the “B” terminal on the control to the 12 volt positive (+) battery terminal using the thick red wire 1.
and fuse holder provided in the kit. (Do not install fuse at this time)
Connect the “G” terminal on the control to battery negative (ground - ) terminal using the thick black wire
2.
provided in the kit.
Note: Failure to connect ground wire directly to negative battery terminal may lead to premature failure of
control module.
Connect the “+” terminal of the control box to a keyed 12 volt positive (+) power source (i.e. fuse box),
3.
using the thin red wire and fuse taps (if necessary) provided in the kit.
Note: Do not connect to a circuit that is directly related to the ignition system or computer system. (if
equipped)
Note: Attach this wire to an ignition controlled source to stop the fan when the vehicle is shut off. Attach
this wire to a constant source to keep the fan running after the vehicle is shut off.
If you have air conditioning:
4. With the 3-way connector provided, pass the A/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 when A/C is turned on.
Insert temp. probe through radiator core fins near the upper (inlet) hose. Install rubber cap over end of
5.
probe.
Note: To maintain position of temp probe the cap must be installed onto probe end.
Reconnect the negative (-) battery cable to the battery.
6.
Place new fuse into fuse holder previously installed at step #1. 7.
*WARNING: If not using
Flex-a-lite’s optional
illuminated switch (PN
#31148), you must
disconnect the switch
ground.
Note: To stop the fan from activating thermostatically, omit the lead to the “+” terminal of the
control box. “B”, “G”, & “M” must remain connected.
ADJUSTING THE TEMPERATURE CONTROL;
1. Attach the temperature control knob to the control box.
2. Turn the knob clockwise completely.
3. Start the engine and allow it to idle, observe the temperature of the vehicle. (Use the vehicles gauge)
4. When the vehicle reaches normal operating temperature, turn the control knob counter-clockwise until
the fan turns on. From here on, the fan should activate at this temperature setting. Adjust as necessary
according to your vehicle needs.
Wiring Diagram
OPTIONAL CONNECTIONS;
Manual Switch (not included) - Allows manual operation of the fan.
(This step is based on Flex-a-lite’s manual switch part #31148, other switches will cause this unit to fail).
1. Connect the “M” terminal to terminal 1 on the switch.
2. Attach terminal 2 of the switch to a 12V positive (+) source.
3. Attach terminal 3 of the switch to ground, in order to illuminate the switch.