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Old 03-20-2011, 11:56 AM
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Cooling Fan Relay

A couple of months ago I changed the cooling fan relay and even made the famous window for future replacements.Yesterday while I was aligning my new hids,I noticed the fan was not moving and looked inside to check the temp and sure enough the check engine light was on and the temp was high.When I went to the parts store I always go to he told me he keeps them in stock because someone always needs it.He even showed me that he sells two different kinds and one he sold 68 last year and the other he sold 29.I know Jeep has to know about it but unless I missed it,I have not heard of a recall.Is there a secret trick or something that I can do or something to make the relay last longer?Maybe I'll just buy a case of these and sell them around the neighborhood.
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Old 03-20-2011, 09:56 PM
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Re: Cooling Fan Relay

The relay should not go out in a couple months... I am sorry and this wont be satisfactory, but this is just a crappy part, and the fact that your aftermarket one went out in a couple months shows the difference between the aftermarket replacement and the factory one that lasted approx 8 years.
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Old 03-28-2011, 01:45 PM
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Re: Cooling Fan Relay

Chrysler knew about the problem. On the 04 they used two relays - one for high and one for low speed. They also put the two relays at the rear of the PDC next to the battery. So far I have not had a problem.
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Old 03-28-2011, 06:31 PM
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Re: Cooling Fan Relay

I actually found out it was the fan motor. The fan would only work at a low speed & when it had to speed up it would stop & blow the relay. I wish I would've found that out 2 relays ago. I replaced it with a new factory fan & relay. I guess you I paid to live & learn.
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Old 04-04-2011, 09:52 PM
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Re: Cooling Fan Relay

I'm wondering if the fan motor is bad on my daughters 2001 Grand Cherokee? Not sure if it has 2 speeds, but it has went through 3 relays in as many weeks. Mechanic says 1st two were from Chrysler. I made him put a Standard Motor Products one on a few days ago, but would like to not have to return there again. Should I just have the fan motor replaced as a precautionary measure? It will cost me $100 for motor and $130 labor to have it installed.
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Old 04-05-2011, 10:08 AM
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Re: Cooling Fan Relay

I would definitely have them check out the fan and the fuse. One of my friends at work recently found out that the fuse was bad after changing his relay twice.
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Old 03-01-2016, 05:59 PM
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Re: Cooling Fan Relay

Anybody know the location the fan relay switch on a 05 jeep grand Cherokee 5.7L?? I've been searching online for location of the relay and called the stealership and they just advised for me to come in and take a look at the relay they had in hand couldn't believe they couldn't help with the location of the relay
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Old 03-02-2016, 01:30 AM
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Re: Cooling Fan Relay

The 5.7 uses a hydraulic cooling fan, which has a control solenoid on the fan assy, but no relay.
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Old 03-02-2016, 04:43 PM
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Re: Cooling Fan Relay

So would a bad solenoid on fan cause the fan to stay on right after jeep is started? Ive replaced a few things but cooling fan stays on
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Old 03-02-2016, 08:16 PM
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Re: Cooling Fan Relay

The hydraulic cooling fan will always run with 300-500 rpm when the engine runs, and will speed up when required. So it seeing spinning at low rpm is normal operation.
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Old 03-02-2016, 10:44 PM
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Re: Cooling Fan Relay

My cooling fan just started coming on and staying on after driving about half a mile fan would only kick on to cool the radiator but darn thing wont turn off stays on so i was wondering if it was a bad relay switch or solenoid or maybe a bad radiator temp sensor the loud fan just bugs me to death always staying on
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Old 03-03-2016, 07:43 AM
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Re: Cooling Fan Relay

If the fan runs at high speed, then that obviously is not normal. There are some inputs used by the PCM to let the fan run at high speed. Coolant temperature is one and if the coolant temperature signal is missing, then the fan goes to full speed. Also AC system pressure is an input. Is there any fault code set?
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