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Radiator Fan Not Starting - 99 Civic EX

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Old Feb 3, 2019 | 06:49 PM
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Default Radiator Fan Not Starting - 99 Civic EX
Fan jumped at the plug turns on. Have put in 2 new and different fan switches but still does not turn on. Right now I installed a manual switch that bypasses the fan switch for the time being. Any thoughts on what it can be?
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Old Feb 4, 2019 | 05:44 AM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
I'm dealing with the same problem. I might need to wire in a manual switch and see if that works until someone answers on here
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Old Feb 4, 2019 | 05:49 AM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
99 civic obd2b ecu also turns on the fan as well, last discussion we had on this. You can also try bleeding the system.
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Old Feb 4, 2019 | 05:50 PM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
Does the loom have 12V at the fan connector with the ignition on?
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Old Feb 5, 2019 | 09:10 AM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
The readings were at 11.82V
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Old Feb 7, 2019 | 02:49 AM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
fans won't turn on until a certain engine temp is reached. Mine took a while for it to finally turn on but it does work.....if your relay and sensors are good.
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Old Feb 7, 2019 | 09:04 AM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
Replace pins in fan switch connector.
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Old Feb 7, 2019 | 09:46 AM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
Also check all of the grounds back to the junction connector under the intake manifold. When I had this problem I found a pin backed out. These looms are getting old.
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Old Feb 7, 2019 | 01:37 PM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
I will try all your suggestions. I will update you today or tomorrow for future reference.
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Old Feb 10, 2019 | 07:38 AM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
Sorry for the late reply but there was a break in the wire going to the ECU.
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Old Feb 10, 2019 | 09:53 AM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
It’s fixed now?
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Old Feb 10, 2019 | 11:19 AM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
Yes the fan is turning on and the cars maintaining op temp
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Old Feb 11, 2019 | 07:09 AM
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Default Re: Radiator Fan Not Starting - 99 Civic EX
congrats.
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