How do you test cooling fan relay in 1986 Chevy Celebrity?

To test the cooling fan relay in a 1986 Chevy Celebrity, first, locate the relay in the fuse box or near the radiator. Disconnect the relay and use a multimeter to check for continuity between the terminals when the relay is activated. You can also apply a direct 12V power source to the relay's coil terminals to see if it clicks and connects the load terminals. If there’s no continuity or the relay doesn’t activate, it needs to be replaced.