Learn how to understand and use a dual fan relay diagram to control the operation of cooling fans in your vehicle. Get step-by-step instructions and helpful tips for troubleshooting and installation.. A detailed guide on dual electric fan wiring diagrams, offering step-by-step instructions for proper installation and troubleshooting of automotive fan systems.
![[DIAGRAM] Elec Wiring Diagrams Dual Fans](https://www.thirdgen.org/forums/attachments/cooling/167187d1226996495-wiring-dual-fans-toggle-fan-diagram-2.jpg "[DIAGRAM] Elec Wiring Diagrams Dual Fans")
![[DIAGRAM] Wiring Diagram 11 Spal Dual Fans](https://the-fan-man.com/wp-content/uploads/2016/11/dual-11-spec-sheet.jpg "[DIAGRAM] Wiring Diagram 11 Spal Dual Fans")
![[DIAGRAM] Elec Wiring Diagrams Dual Fans](http://www.technovelocity.com/chevyhackers/tech_articles/dual_fans/wire_harness.jpg "[DIAGRAM] Elec Wiring Diagrams Dual Fans")
Dual Fan Wiring Diagram. WIRING Important: The Electric Fan Assembly is built using a High Output two speed motor. If you choose to operate the fan using both speeds, two switching devices or a Derale Dual Fan Controller Part # 16788 / 16789 must be used. Reference Diagrams #7 & 8 on page 3 WIRE COLOR DESIGNATIONS