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To check if your thermo fan is working on a 1989 Hilux Surf, start the engine and let it reach operating temperature. Feel the radiator and the hoses; if they are hot and the fan is not running, the thermo fan may not be functioning. Additionally, you can listen for the fan operation when the engine temperature rises, or manually trigger it by connecting the fan to a power source to see if it spins. If it's not working, it may be time to check the wiring, relay, or replace the fan itself.

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1mo ago

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