Celica Reolaced Relay for Fan 2 and It Stoped Working Again

If your radiator fan doesn't work, don't automatically assume y'all've got a bum fan motor.

Radiator fan relay

Electric radiator cooling fans apply a lot of juice. So carmakers utilize a fan relay to switch them on and off. If your radiator fan doesn't work, don't automatically presume y'all've got a bum fan motor. Showtime exam the fuse for the radiator fan. If it checks out, test the radiator fan relay.

Here's how to test a radiator fan relay. Unplug the electrical connectors to the radiator fans. Then plow your A/C to the MAX position and kickoff the engine. Utilize a multimeter to check for power at the unplugged fan connectors. If y'all don't run into 12 volts at the connectors, the fan isn't getting power from the relay. The fan relay is usually located near the bottom of the engine compartment on a metallic frame member. The metal acts as a oestrus sink to go along the fan relay cool. So, unplug the connector at the relay and echo the check for power. If y'all get power, you've got a bum relay. If you aren't getting power at the relay, you've got a more than serious wiring or computer problem, and that'south a chore for a pro. Simply you lot can hands supersede a bum relay yourself.

Thermal grease on a radiator fan relayStart by removing the erstwhile relay and checking for corrosion around the mounting surface. DIYers often merely supervene upon the relay without removing the corrosion. That's a prescription for a echo failure. Instead, sand off all the corrosion until you get to bare metal. Then apply a generous amount of thermal grease to the dorsum of the new fan relay (see photograph, correct).

Secure it to the metallic frame and let the grease squish out on all sides. The new relay volition power upward the fans, and the thermal grease volition transfer heat to the metal frame and prevent corrosion.

— Rick Muscoplat, Automotive Editor

For more vehicle maintenance and repair tips, visit our Motorcar Repair section.

Plus: 100 Car Maintenance Tasks You lot Can Do on Your Own

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Source: https://www.familyhandyman.com/article/automotive-stop-repeat-failures-on-radiator-fan-relays/

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