Flex-a-Lite 117 Electric Cooling Fan - Manual (Page 3)

7. Manual Switch (Optional)
For manual switch operation, use Flex-a-lite p/n 31148. Connect switch as shown on the wiring
diagram (previous page). To override engine temperature and turn fan on, connect the switch to the
"M" terminal on the control unit. NOTE: To prevent thermostatic activation (if only manual switch
operation is desired), omit the lead to the "+" terminal of the control box. "B", "G", "M+" and
"M-" must remain connected. If using a switch other than a Flex-a-lite manual switch, do not
connect a ground wire to the switch!
8. Secure loose wires
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 into the fuse holder.
9. Insert temperature sensor
Locate the temperature sensor. Gently push probe through fins in radiator as close to the upper radiator
hose as possible. The rubber insulator cap should be used when possible to insulate any of the probe
coming through the front side of the radiator.
Rev. 02-09-12 98115 Page 3 of 4
Wiring Instructions 115 Cont'd.
Install temp. probe near inlet hose... then replace the insulator cap.
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 hand-held
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. is reached, 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.
Wiring Instructions - Model 117
1. (Puller configuration): Wire the fan motors to power source (control unit or switch and relay if
desired). Connect the red wires from the fan motors to a 12v. positive (+) source. Connect the black
motor wires to a ground (-) source. NOTE: Failure to do this will result in incorrect operation and
damage to the fan motors!
2. Connect the fuse holder. Be sure to connect the provided fuse holder in-line with the positive (+)
power wire to protect the fan motors and your vehicle's electrical system from damage.
NOTE: For pusher configuration, flip the fan blade over and
reverse motor wire polarity (black motor wire positive, red motor
wire negative).