Flex-a-Lite 31163 Installation Instructions
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Flex-a-Lite 31163 Installation Instructions

Variable speed control with screw-in temperature sensor
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Installation Instructions

#31163 Variable Speed Control with Screw-in
Temperature Sensor
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).
Important:
Before beginning, be sure that the Variable Speed Control unit (VSC) is mounted close enough to the
temperature sensor so that the wires will reach the control unit. The lead on the sensor is approxi-
mately 4 feet.
1. Using threaded adapters if necessary (included), screw the sensor into the desired location using Teflon tape
to seal the threads. Use Flex-a-lite part no. 32082 (1 ½" diameter) or 32084 (1 ¾" diameter) to mount sensor
inline with radiator hose (Preferred location - see Detail A). Alternatively, the sensor can be mounted in the
intake manifold (see Detail B) or cylinder head or block (see Detail C). DO NOT overtighten.
2. Carefully strip the ends of the wires. Fold the wire back on itself to effectively double the thickness (see
Detail D). Using a quality crimping tool, crimp the female connectors provided on the ends. Attach the wires
to terminals 10 & 11 on the VSC (it doesn't matter which wire goes to which spade, but both wires must be
connected). Make sure the temperature. sensor wires are at least 2-3" away from exhaust manifolds or
other extreme heat sources.
3. Start the vehicle and check for leaks. When the engine has reached desired operating temperature, adjust
the VSC to turn the fan(s) on (see page 2).
Detail A
Detail B
Detail C
Detail D
01-11-08 Page 1 of 2
part no. 91163

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Summary of Contents for Flex-a-Lite 31163

  • Page 1: Installation Instructions

    1. Using threaded adapters if necessary (included), screw the sensor into the desired location using Teflon tape to seal the threads. Use Flex-a-lite part no. 32082 (1 ½” diameter) or 32084 (1 ¾” diameter) to mount sensor inline with radiator hose (Preferred location - see Detail A). Alternatively, the sensor can be mounted in the intake manifold (see Detail B) or cylinder head or block (see Detail C).
  • Page 2 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.

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