Question about 2001 Jeep Grand Cherokee
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
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
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
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
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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