Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. At the same time the high speed fan relay coil is energized closing the relay contacts and provides battery positive voltage from the high fan fuse on the cooling fan motor supply voltage circuit to the right cooling fan. When the switch closes to ground (within 170-210°C) the relay is energized and powers the fan. The electric relay in a furnace is responsible for relaying electrical power to the heating elements and the blower motor inside the furnace cabinet. 2) 75amp relay 3) Thermal Fan Switch (SPU-IX-195TS) 4) 12v switch 5) 12v /50amp circuit breaker (BSS-CBC50HB) 6) Inline fuse for ignition source 7) 12GA wiring (fan) 8) 14GA wiring 9) 2-pin connector for fan harness. 41), refer to the label on PDC cover. So today we are working on my old 1964 Buick Skylark. For best results mount the relay in as close proximity to the electric fan as possible. Remove Electric Fan Relay filter (-) Remove Electric Fan Relay filter Electric Fan Relay; Series. How to Wire an Electric Fan with a Relay on a Classic Car Installing the Thermostatic Sending Unit. Terminals #30 & #87 can be reversed. 4 Posts . And the switch will open and break the ground circuit when the temperature drop. When the engine cools, the contacts on the fan relay switch open, and the fan stops … Relays are used where it is necessary to control a circuit by an … This energizes the cooling fan s/p relay coil, closes the relay contacts, and provides a ground path for the left cooling fan. Click image to zoom. For the location of relay within the PDC (Fig. Painless Performance 30106 - Painless Performance FAN-THOM II Electric Fan Relay Kits Fan Control, Relay Kit, Weatherproof, Non-Adjustable, M12 x 1.5, Chevy, GMC/Pontiac, Kit Part Number: PRF-30106 When the coolant reaches 185°-215°, the contacts on the cooling fan switch close, activating a relay which directs current to your electric fan. 87 (red wire) connects to the positive wire on the electric fan. In a changeover relay, the 87a pin will be “HOT” anytime the 87 pin is "OFF," so long as power is connected to pin 30. The heating elements provide the heat to warm the air, and the blower motor sends this warmed air through the ductwork. Dual Electric Fan Wiring Diagram With Relay Taurus Fan Control Page 6 Pirate4x4 Com 4x4 And Off How To Wire Headlights From Scratch Wiring Diagram Rows Painless Fan Relay Wiring Diagram Wiring Diagram Jeep Relay Wiring Wiring Diagram 500 1c4e3 Single Speed Dual Cooling Fan Wiring Diagram Digital Weatherproof Fan Relay Kit Painl… #87A - Not used in this application. Or a single relay could be used to control both fans. Are you running dual electric fans and need a set of relays to power them effectively? Discussion Starter • #1 • Jan 11, 2009. does anyyone know wheres the electric cooling fan relay is located? It powers up your electric fan when your motor reaches -185 degrees F and powers down when your motor reaches 170 degrees F. 2 x 25 amp relays, I ran with a single 30 amp fused relay on duel fans wired together, and it seemed to blow fuses so I went with duel 30 amp relays one to each fan and I have no more problems, mine can draw up to … Thanks go to Bob Wilson (volvodad on Brickboard) for contributing to these differences. It reveals the elements of the circuit as streamlined shapes, and the power and signal links in between the tools. When the coolant within the radiator reaches a specified temperature, the sensor activates the fan. & # 87 can be reversed the coolant within the radiator reaches specified... Jan 11, 2009. does anyyone know wheres the electric relay in a is. Diagrams PAGE 1 electric relays can connect to alarm systems, activating an alarm the. Commonly controlled using relays ), refer to the ignition switch available per your.... 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