1990 Honda Civic Cooling Fan Won't Kick in
The radiator fan keeps your 1990 Honda Civic from overheating in traffic. Coolant transfers the engine heat to the radiator where the liquid is separated into thin metal tubes. Air passes through the mesh of thin metal tubes as you drive cooling the liquid. When the car is stopped the electric radiator fan is responsible for cooling the radiator. Fix the radiator fan when your 1990 Honda Civic overheats in traffic while the fan fails to operate.
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Instructions
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Remove the kick panel underneath the steering column to reveal the fuse panel. Use the illustration on the kick panel to locate the cooling fan fuse. Remove the fuse and visually inspect the metal filament. If the filament is broken replace the fuse.
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Open the hood and locate the radiator fan. Visually inspect the wiring harness and all wires leading from the harness into the engine for breaks, cracks or cuts. The wires will lead to relays and control units. Open the relays and control units and inspect filaments for integrity. Replace any broken electrical equipment.
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Run the engine until operating temperature is reached. Use a voltmeter to test the ground at the thermo-switch in the thermostat housing. Replace the thermo-switch if the ground is not complete.
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Replace the thermo-fan. Remove the upper radiator hose, disconnect the fan wire harness and unscrew the fan shroud. Remove the fan, fan motor and shroud in one piece.
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Tighten the new fan shroud mounting bolts to 7 foot pounds. Connect the fan wire harness and reconnect the upper radiator hose. Fill radiator with antifreeze and bleed the system for air pockets.
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Tips & Warnings
Make sure your fingers are clear of the fan blades while repairing anything that could start the radiator fan. Make sure the engine is cold before removing the thermo-fan.
References
- Photo Credit radiator humor image by John Sfondilias from Fotolia.com
