Question about 2001 Jeep Grand Cherokee

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I have a problem with my cherokee cooling fan relays keep burning out.

I have had my relay replaced 5 times since last summer, replaced cooling fan thinking it might be problem. I've had 2 different mechanics look at it, one just gave up and the other after replacing my relay 3 times just keeps telling me they are crappy relays. but they are Chrysler relays not after market. does anybody else have any suggestions on what could be wrong? the one mechanic thought that they might be breaking down due to heat but not sure why or how. I am going to replace this one myself and any help on how to get at it would be appreciated, Thanks

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  • Jeep Master
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Well fred the thing to do would be to voltage drop test the electrical circuit an test to see how much current is being pulled on the circuit ! Do you own a DVOM - digital volt ohm mete , do you know how to use one ? Also check where the relay plug's into , does the relay box look burnt ? High resistance ! Check to see if the relay fit's tight . . Electric Testing Techniques You Need to Know
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia

http://www.bbbind.com/free_tsb.html you can find free wiring diagrams here .

Posted on Apr 26, 2017

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Posted on Jan 02, 2017

  • 5370 Answers

SOURCE: 2002 Cherokee. Started with

Get the ac pressure test done.If the pressure test checks out low then its a coolant problem.Due to low coolant the jeep is getting overheated.The other problem of overheating can be faulty thermostat.Check out both this possibilities.Also check the relay and fan motor voltage.If its low then required voltage then it can be the issue.But its not necessary that after market parts are not supporting.But yes if this parts are getting weak then it has to be replaced. ---------- This should help.Thanks.Helpmech.

Posted on Dec 13, 2010

  • 2187 Answers

SOURCE: I have a 1994 Jeep Grand Cherokee. It starts 98%

If the tapping done on the relay is to short or bypassing it then you may have an issue with the relay. I suggest to have it replaced or try a known working one from a similar car. If it meant tapping or bypassing the wiring, inspect the line from the relay to the power. You may a have bad wires somewhere, like loose connections, exposed conductors, loose ground or corroded terminals including the ports where you plug your relay in.

Posted on Aug 02, 2011

  • 1 Answer

SOURCE: My cooling fan has no power even when wired directly to ignition.

you can test ur fan with running" leads" or wires. a + and- from fuse box straight to fan wires, putting a on and off switch in between. its to check is fried or not. switch in line really not needed but it works

Posted on Feb 22, 2012

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1 Answer

2003 Jeep Grand Cheeroke radiator fan runs when car is off draining battery. Could it be the relay? If yes is the relay in the fuse/relay box under the hood or under the passenger headlight?


After checking the conventional relays and fuses, we found an additional auxiliary cooling fan relay behind the front bumper. Once replaced, all is well.

The fan relay is likely shorted and keeping the fan motor energized; to check this you can remove the relays from the fuse panel... remove the cooling fan rely from the underhood PDC (Power Distribution Center). Fot this and additional fuse details, check this link: wjjeeps.com/fuses.htm

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1 Answer

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I have a 2001 jeep grand cherokee and the fan relay keeps blowing on me , the last time i changed it i also changed the fan motor, because i found that it was drawing to much power and blowing the...


you are correct in presuming the fan motor is drawing to much current and and causing the relay to burn out problem with this thinking though i would have expected the fuse to go first as this should have a lower ampage rating than the relay and should blow first so if a new motor has been fitted check the fans grounding as if not grouned properley it will cause a resistance hence higher current flow same on the relay itself check the grounding replace the relay with a heavy duty one if you find no problem with the grounding which i think it is i would put an in-line fuse on the live feed on the fan itself as this will blow first and keep the cost of replacing relays or fan again ps check the wiring for signs of overheating yates210456

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