Owners manual

Rev. 04-06-10 Page 3 of 4 #99183

1. Find the thick red and black wire in the kit. Determine the length needed to connect the red and black

power leads on the VSC to the battery terminals and trim appropriately. Crimp a large yellow ring connector to

the end of the black wire and connect to the negative (-) battery terminal. Connect the other end to the black

wire on the VSC with a large butt connector (yellow sleeve).

. Locate the fuse holder. DO NOT INSTALL THE FUSE UNTIL ALL THE WIRING IS COMPLETE. Attach

a large ring connector to one end and a yellow insulated butt connector to the other end of the fuse holder.

Attach the ring connector to the positive (+) terminal of the battery and connect the other end to the thick red

wire found in the kit. Determine the length of wire needed to reach from the fuse holder to the red wire on the

VSC and trim appropriately. Use a yellow insulated butt connector to connect this wire to the red wire on the

VSC.

3. Find a circuit that is “hot”, preferably in a fuse box, when the key is in the “on” position. Attach the in-

cluded fuse tap to fuse. Attach a pink female connector to one end of the thin red wire (included) and connect

to fuse tap. Determine length of wire needed to reach the VSC and trim to appropriate length. Attach a pink

female connector to the end of the wire and connect to terminal #9 on VSC.

4. Locate wires going to A/C clutch. Determine which wire is ground and which is positive. Then attach

supplied thin green wire by way of a piggyback connector to the positive wire that activates the clutch. Attach

wire to terminal #8 on the VSC. Terminal #7 will be left open for this application.

5. Locate the temperature probe. Gently push the probe through fins in radiator as

close to the upper radiator hose as possible with ¼”-½” of the probe protruding out of

the front of the core. The rubber insulating cap should be used whenever possible to

insulate any of the probe coming through the front side of the radiator. Determine

length of wire needed to reach VSC. IMPORTANT: Strip the insulation on the tempera-

ture probe wires back about 1” and fold the wire on itself to effectively double the thickness of the wire before

connecting spade connectors. Then attach these wires to terminals #10 & #11. Both wires need to be con-

nected, but it doesn’t matter which wire goes to each terminal.

6. If manual switches (Flex-a-lite #31148) have been purchased, attach them as following. To override

engine temperature to turn fans off, connect the switch to terminal #5 on VSC to send a ground signal. To

override engine temperature to turn fans on, connect the switch to terminal #6 on the VSC so that a ground

signal is sent.

7. Reconnect negative (-) battery cable to battery.

8. At this time install the provided fuse into fuse holder.

Initial Set-up and Adjustment

1. Turn ignition on. After 5-6 seconds, LED #4 should light up. If not, check to make sure that you have 12

Volts at terminal #9 on VSC. The delay is to allow starter to start the vehicle without the fans drawing any

power.

2. With your engine running, engage the A/C. Your fan should come on and cycle with the A/C clutch. LED’s

#1, 3, and 4 should be lit when fans are running. If they do not turn on, verify that the A/C clutch is engaged

and make sure that you have the appropriate wires connected to the correct terminals on the VSC. Shut off A/C

and let engine continue to idle until it has reach normal operating temperature.

3. Verify that normal operating temperature has been reached by feeling upper radiator hose. Hot water

should be flowing through the hose into the radiator. Adjust the screw on the VSC counterclockwise for a cooler

setting or clockwise for a warmer setting. Once desired temperature is set, let engine continue to idle to make

sure the fan will cycle to maintain desired temperature. When fan is running, LED’s #1 and 4 should be lit.