Mercedes Ml500 Suction Fan Not Working Sparks When Power Is Applied

If your radiator fan doesn't work, put on't automatically assume you've got a bum fan motor.

Radiator fan relay

Physical phenomenon radiator chilling fans consumption a lot of juice. And so carmakers use a fan relay to switch them on and off. If your radiator rooter doesn't work, don't automatically assume you've got a bum fan motorial. First test the fuse for the radiator fan. If information technology checks out, exam the radiator fan relay.

Here's how to test a radiator fan relay. Unplug the physical phenomenon connectors to the radiator fans. Then turn your A/C to the MAX position and start the engine. Use a multimeter to check for king at the unplugged fan connectors. If you don't see 12 volts at the connectors, the buff International Relations and Security Network't getting king from the relay. The devotee electrical relay is usually located near the bottom of the engine compartment on a metal frame member. The metal acts as a heat sink to keep the rooter relay cool. So, unplug the connector at the relay and reiterate the check for power. If you get power, you've got a arse around electrical relay. If you aren't getting powerfulness at the electrical relay, you've got a to a greater extent serious wiring or computer job, and that's a job for a pro. But you can easily replace a bum relay yourself.

Thermal grease on a radiator fan relayStart by removing the old electrical relay and checking for corrosion around the mounting surface. DIYers often just replace the relay without removing the corrosion. That's a prescription for a restate failure. Instead, sand off all the corrosion until you get to bare metal. And then practice a generous amount of thermal grease to the plunk for of the new fan relay (see photograph, right).

Secure it to the metal frame and Army of the Righteou the grease squish come out of the closet on all sides. The fresh relay will power up the fans, and the thermal grease will channel inflame to the bimetallic frame and prevent corrosion.

— Wrench Muscoplat, Moving Editor

For Thomas More fomite alimony and furbish up tips, visit our Auto Indemnify section.

Plus: 100 Car Care Tasks You Backside Coiffure along Your Own

Mercedes Ml500 Suction Fan Not Working Sparks When Power Is Applied

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

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