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1967 Chevy C10 - Spal High Performance Fan Install - Temperature Control

Keep Your Truck Cool With Spal's Dual 12-Inch Fan And Electronic Controller
By Calin Head
Photography by The Sport Truck Staff
Spal High Performance Dual Fan Install 1967 Chevy C10

Spal High Performance Dual Fan Install Dual Fans

Spal High Performance Dual Fan Install Spal Fan

Spal High Performance Dual Fan Install Fan Unit
1.The crew at Spal welded four little mounting tabs on the radiator tanks before we got there, so we weren't able to photograph that stage of the install. Once the tabs were in place, the all-in-one fan unit slid right in.
Spal High Performance Dual Fan Install Installing Module
2.After the fans were in, it was time to choose a location to mount the FAN-PWM module, making sure the buttons on the module would be accessible later on. Spal mounted the module on the core support using the supplied self-tapping screws. The dual-fan setup required a Fan Relay Harness (FRH). Spal chose to mount it next to the FAN-PWM module.
Spal High Performance Dual Fan Install Wires Routed
3.Next, the wires were routed. Spal made sure to keep away from high-heat sources. The main wires were hooked up per the instructions: red to power and black to ground. The fuse was left out of the harness at this point because the controller still needs to be programmed and we don't want it to have power yet.
Spal High Performance Dual Fan Install Wires
4.There are more specific wires to be spliced in as well like the temperature-sensor wire and the A/C signal wire. This setup is made to work in conjunction with factory wiring instead of adding additional sensors. The temp sensor will tell the controller the temp of the motor, and the A/C signal will tell the unit to kick both fans on at 100 percent when the A/C is turned on.
Spal High Performance Dual Fan Install Fan Pwm Module
5.After the wires were hooked up, the fuse was installed and the fans were unplugged. Then, the truck was started and warmed up to the desired "Low" temperature setting. Next, the technician pressed and held the "Low" button on the FAN-PWM module and waited until the light began to flash. The process was repeated to program the "High" setting. Generally, the "Low" setting is at or around 170 degrees F, and the "High" setting lies between 205 and 210 degrees F (15 degrees above thermostat).
Spal High Performance Dual Fan Install Test Settings
6.After the truck cooled down, the technician connected the fan and restarted the vehicle to test the settings. Wouldn't you know it, the fans worked great. If they hadn't turned on at the right time, the controller could have been reprogrammed.
Spal High Performance Dual Fan Install Cooling Fan


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