Owners manual

WIRING INSTRUCTIONS
rev. 11-29-06 Page 2 of 2 99894
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 con-
nector 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).
2. Locate the fuse holder. DO NOT INSTALL THE FUSE UNTIL ALL THE WIRING IS COMPLETE. At-
tach 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. You may use the 2 small screws to mount the fuse holder if desired.
3. Find a circuit that is "hot ," preferably in a fuse box, when the key is in the "ON" position. Attach the
included 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 VSC and trim to appropriate length. At-
tach 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 clutch. At-
tach wire to terminal #8 on the VSC. Terminal #7 will be left open for this application.
5. Locate 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 will not be used for this application.
Determine length of wire needed to reach VSC. IMPORT
ANT
: Strip the insulation
on the temperature 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 termi-
nals #10 & #1
1. Both wires need to be connected, 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 of
f, 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.
1.
Turn ignition on. After 5-6 seconds, LED #4 should light up. If not, check to make sure that you have 12
V
olts 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 fans 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 wire connected to correct terminal on the VSC.
Shut of
f A/C and let engine continue to idle until you reach oper-
ating temperature.
3. Verify that operating temperature has been reached by feeling
upper radiator hose. Hot water should be fl
owing through 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 fans will cycle to maintain desired temperature. When
fans are running, LED's #1 and 4 should be lit.
Initial Set-up and Adjustment
The Variable Speed Control has new features!
When you set the on temperature, the fans will come on at 60%; this reduces the load on your charging system. If the
temperature rises, the fan speed will increase. If your set temperature is 185° F, then between 185° and 195° the fan
speed will increase from 60% to 100%. So after a 10° rise from the set point, the fans will be running at 100%.