Question about 1991 Honda Civic

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1991 Honda civic 4 dr. The temp gage stays on cold all the time and the engine cooling fan never kicks on. Is there a relay somewhere for them? As soon as it gets hot the check engine light comes on.Probably cause the cooling fan isn't coming on?

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Check on the engine around the thermostat housing for a fan control sensor. if your engine fan doesn't come on when the a/c is on, then thats your prob.

Posted on Jul 20, 2009


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My cooling fan will not cycle off. It runs until the battery dies

At first I would have said it was your relay. They are known to get shorts and stay on. But you had that and the sensor changed. I would have to say it's time to trace teh wiring and make sure the wires aren't rubbing somewhere. It's a pain I know. I would start at the fan and work your way back to the relay. Might want to tap on the relay a little to make sure the new one didn't get shorted out by bad wireing somewhere else.
There is also a “cooling fan timer” located inside the vehicle in the driver sideof the dash. This is going to be much harder to diagnose….and I am notsure how expensive a guess that will be to replace. If the relay doesnot solve the problem, I would call your local Honda dealerparts department and tell them your problem and see what they say. Theyshould know which parts fail the most and what they sell the most of.

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Hi. Check the bottom of the radiator or on the side, as you also have a temperature-sending switch. The switch must reach a certain temperature before sending a signal on to the fan relay.

The switch just screws into the radiator.

If you would like to contact me again about this or other problems, feel free to do so.
ASE Master Technician

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