radiator fan not kicking on...troubleshooted and...
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radiator fan not kicking on...troubleshooted and...
B18 motor
just replaced the thermostat....fuses are good....if I jump the cooling fan switch connector with a piece of wire the fan will kick on.
guessing its a bad cooling fan switch?
thanks
Mike
just replaced the thermostat....fuses are good....if I jump the cooling fan switch connector with a piece of wire the fan will kick on.
guessing its a bad cooling fan switch?
thanks
Mike
Last edited by hotcivicsi; 03-28-2009 at 12:32 PM.
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Re: radiator fan not kicking on...troubleshooted and...
replaced the cooling fan switch ...fan still not kicking on...what else should I check?????????????
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Re: radiator fan not kicking on...troubleshooted and...
coolant has been replaced, new water pump, new thermostat and new cooling fan switch only thing left that I know of is the coolant temperature switch....
#6
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Re: radiator fan not kicking on...troubleshooted and...
is it reaching a temperature where the fan should even be kicking on? as in, its overheating? hows the car acting? is the headgasket blown? or is the radiator or cap leaking?
if you can jump the 2 pins of the fan switch together and the fan kicks on, then you can immediately be 100% sure that everything in the system is functioning properly besides the fan switch, as long as its being heated up to proper temp. you can always put the fan switch in a small metal cup of coolant (the bottom half of a soda can works well), heat that up with a small torch, monitor the temp with a probe that'll read up to 250 deg f., and monitor continuity on the pins. a good switch should close around 190-210ish. a bad switch won't close to beyond 230. it really doesn't take much to rig up a good fan switch tester.
your only other possible problem is that the coolant (or air) thats contacting the fan switch isn't reaching fan switch operating temperature.
if you can jump the 2 pins of the fan switch together and the fan kicks on, then you can immediately be 100% sure that everything in the system is functioning properly besides the fan switch, as long as its being heated up to proper temp. you can always put the fan switch in a small metal cup of coolant (the bottom half of a soda can works well), heat that up with a small torch, monitor the temp with a probe that'll read up to 250 deg f., and monitor continuity on the pins. a good switch should close around 190-210ish. a bad switch won't close to beyond 230. it really doesn't take much to rig up a good fan switch tester.
your only other possible problem is that the coolant (or air) thats contacting the fan switch isn't reaching fan switch operating temperature.
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Re: radiator fan not kicking on...troubleshooted and...
temp gauge goes about half way so I think the fan should be kicking on. The car was only overheating before if I sat in traffic at a dead stop. Cap or radiator arent leaking. can it be a relay or the coolant temperature switch?
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Re: radiator fan not kicking on...troubleshooted and...
There is a 1 wire sensor underneith your distributor, make sure that wire didnt break, if it didnt replace that sensor its the temp sensor
#11
Re: radiator fan not kicking on...troubleshooted and...
check the single wire, and check the radiator fan relay that it eventually leads to. it's probably the relay. the relay is the only thing you haven't changed in the circuit i believe. and if you're jumping the switch and it's kicking on the fan, then that is the only thing that is going on. the switch is working, but it isn't receiving any juice from the relay.
Last edited by fast_4_door; 03-28-2009 at 02:09 PM.
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Re: radiator fan not kicking on...troubleshooted and...
everything works guys...just took it on a longer ride and the fan turned on. I'm happy now haha
I think it was the cooling fan switch that was causing the issue before....its not the one you have pictured above the one I replaced was on the thermostat housing
I think it was the cooling fan switch that was causing the issue before....its not the one you have pictured above the one I replaced was on the thermostat housing
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Re: radiator fan not kicking on...troubleshooted and...
yeah, i figured the old fan switch was bad, you replaced it, and it just hadn't heated up hot enough for your fan to need to kick on yet. by the way, that little 1-wire sensor on the head under the dizzy works the coolant temp gauge
#17
Re: radiator fan not kicking on...troubleshooted and...
Not to hi-jack the thread but I have the same problem. Checked the fan and it works. I guess I have a 50-50 chance from here.
Would you change the fan switch first or the engine temp switch.
Sorry if I offended anyone.
Would you change the fan switch first or the engine temp switch.
Sorry if I offended anyone.
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Re: radiator fan not kicking on...troubleshooted and...
i actualy replace the coolant temp switch or was it the fan switch not sure....its on the same housing where the thermostat is....on my b18
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Re: radiator fan not kicking on...troubleshooted and...
I had a similar problem and it turned out to be a bad wire, had to replace it and no more overheating from the fan turning on when it wanted to.
#20
Re: radiator fan not kicking on...troubleshooted and...
Thanx for the replies. I replaced everything, rad, switches, thermostat, cap. It works fine now.
That was easier than trying to figure it all out.
Thanx Again
That was easier than trying to figure it all out.
Thanx Again
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