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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First check for a cooling fan fuse in the engine compartment relay box. if the fuse is good, it would be the relay or the switch.
Try this-- find the switch somewhere on top of the engine--probably near the front. it looks like this with a connector on it:

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Pull the connector off and use a big paper clip to connect the terminals inside the connector. Start the engine. If your relay is working, this should make the fan come on. If not, the relay is bad. If yes, the switch is bad. Let me know if you have questions.

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check thermostat might be sticking or radiator may need flushing if it only heats up while idling check your electric fan may not be coming on try turning on the a/c the 2 cooling fans should come on then if they do then i would check the cooling fan switch if they do not come on when the a/c is switch on you may have a bad electric fan motor or wiring to the fan or fan relay

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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.
Bill
ASE Master Technician

Nov 26, 2008 | 1995 Honda Civic

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