RH-03 LSX LTX EFI Dual Speed Fan Harness
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RH-03 LSX LTX EFI Dual Speed Fan Harness

$180.00
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After lots of requests from customers, it's finally here. Out plug-and-play dual speed fan harness. How does this magic harness work you ask? Great question. It creates a low speed by running both fans in series at the low speed operation. If we have two identical fans and run them in series, the result is each fan will get exactly 1/2" of the applied voltage. In a standard 13.8v automotive system, that means each gets 6.9v. Hence, it runs at about 30% of the max fan RPM at low speed. Then when full voltage is applied, it runs at full speed. Hence giving you two speeds. I would like to take credit for this ingenious design, but it's been used in the automotive world going back to the 70s. The most popular usage of this series/parallel fan control is on the 4th gen fbody and C5 Corvettes with the LSX motors.  We've packaged this together into a very easy to use plug-and-play wiring harness. It has two fan triggers that are activated by grounding the trigger wires. It can either be used

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