Owners manual

Wiring Instructions Model 480

Step 1: Locate mounting point for the VSC (variable speed control) unit

Locate a mounting point for the VSC near inlet side of the radiator. The control unit needs to be

placed within about 2' of radiator inlet hose. On the fender well next to the radiator may be a

convenient location. Attach the control unit using the screws provided.

Step 2: Wire the fan motors (refer to Wiring Diagram, below)

Using the large, non-insulated bullet connectors provided, attach a length of the thick (10 AWG) red

wire to the red motor wires at fan. Attach a length of the thick (10 AWG) black wire to the black

motor wires at the fan. Once the fan is in place, these will attach to the control unit. If mounting the

control somewhere in the engine compartment, leave enough wire to reach the control unit.

rev. 1-3-08 98480 Page 2 of 4

NOTE: Model 490 does not include a fan control unit; skip to page 4 of instructions

NOTE: For pusher conﬁguration, ﬂip the fan blades over and reverse

motor wire polarity (black motor wire positive, red wire negative).

3. Connect the fan wires to the VSC

Now begin wiring the motors to the VSC. Using the large butt connectors provided, connect the red wire

you attached to the fan motor wires in Step 2 to the yellow wire on the VSC. Connect the black wire from

the motor wires to the purple wire on the VSC. (see Diagram 5 below) NOTE: Failure to do this will

result in incorrect operation and damage to fan motors!

4. Connect power leads

Determine the length needed to run thick red and black wire from the VSC to the battery terminals and trim

appropriately. Crimp a large yellow ring connector to one end of the each wire and connect the black wire

to the negative (-) battery terminal, but do not connect the red wire yet. Using butt connectors, connect

the fuse holder provided inline with the red wire. The fuse and fuse holder will protect the fan motors and

your vehicle's electrical system from damage.

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).

WIRING DIAGRAM - MODEL 480 (PULLER CONFIGURATION)

Diagram 5 - Wiring detail for Model 480 fan