Scram Speed
Scram Speed Dual Electric Fan Relay Wiring Harness - ground triggered. GREAT for EFI swaps!
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This is the easiest way to activate your electric fan. No risk of poking a hole in your radiator as with the thermocouples that so many kits use. These switches plug into a NPT coolant port and the switch closes at 200* of coolant temp.
We recommend using this switch to provide ground to your fan relay. Easy installation and trouble free activation! It is rated to 30 amps if used on the 12V+ side. However, we do not recommend this for primary voltage direct to the fan!
NEW! Available in four sizes, each to match the commonly available ports in your intake manifold! We offer these switches in NPT sizes for 1/8,1/4,3/8, and 1/2 NPT! No more ugly adapters or air bubbles causing problems with your fan activation!
Do you need a thermal switch for LS? Check out our exclusive thermal switches with the correct metric thread for LS heads!