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Car Forum / Honda Cars / September 2006cooling fan trouble
I recenlty noticed that my 90 accords cooling fan was running hours after I turned the engine off, and kept running until the battery was dead. I recharged the battery and started unpluging sensors while the fan was running to locate the problem. When that didnt work I unplugged the cooling fan relay located in the fuse box under the hood. That finally shut the fan off. I then noticed that I could here some clicking while I was replacing it. Nothing unusal, but it continued clicking after it was pluged in (and the fan continued to run). I unpluged the relay and called it a day. The next morning I pluged the relay back in and the clicking noise was gone, and the fan wasnt running. I thought the problem fixed itsefl until I drove it to work and the damn thing started overheating. Now the fan wont come on at all. I replaced the relay, and that didnt work (no clicking either). I dont think there is any power going to the relay, but I dont know how to check for that. I was told that it could be a bad cooling fan switch that screws into the radiator. I was going to replace that next but I want to get some professional feedback before I start replacing parts. Any advice would be much apreciated. It is not a good idea to go replacing electrical components with the battery plugged in, unless you are an expert and know for sure, that the component in question does not have any power to it. "I then noticed that I could here some clicking while I was replacing it." That could have been relay contacts welding themselves together and making relay coils burn themselves out. The switch is a likely candidate. If it is responsible for the original problem of the fan staying on, then the terminals should be shorted together internally, which you can verify with a multimeter or test light. You probably want to get a circuit diagram first. The Haynes Manuals usually have fairly accurate ones, but they can be hard to read because they are in black and white and because they try to cover several years in one diagram. Earle > I recenlty noticed that my 90 accords cooling fan was running hours > after I turned the engine off, and kept running until the battery was [quoted text clipped - 14 lines] > but I want to get some professional feedback before I start replacing > parts. Any advice would be much apreciated. The Honda newsgroups have seen a fair amount of reports of the timer for the cooling fan failing. The solution is to replace it. Group.google the archives. Also, see the troubleshooting procedure for cooling fan controls at : http://media.honda.co.uk/car/owner/media/manuals/AccordManual/400/16-103.pdf It's for a 91-93 Accord, so it may not dead-on duplicate your 90 Accord. Do not let the car overheat again. You are putting your Honda's head gasket at great risk, resulting in an expensive repair. >I recenlty noticed that my 90 accords cooling fan was >running hours [quoted text clipped - 31 lines] > start replacing > parts. Any advice would be much apreciated.
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