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i have heard a vehicle speed sensor can cause it but not sure
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Finally! Other Jeeps with the same problem. I have identical year/make and constantly have the message display telling me to 'service 4 wheel drive switch' beep beep. The warn…ing message varies with frequency, displays once or twice a month, sometimes all day for a week. The only place I found the word 'switch' was in a Jeep repair manual. the switch was located in the Transfer case & the manual said don't touch,see a professional. I've been driving like this for months. I see the message above, their jeep switch was replaced but the computer warning still flashes. Any luck out there? According to the mechanic who works on my 94 Jeep it's one of three things. 1) Corrosion on the connector to the switch (which is located on top of the transfer case). 2) A bad switch. Part cost about $22.00 or 3) A bad console display. he says they have had a fair number of console display units fail. That one runs about $240. My Jeep display it only once in a while. I have checked the connections and they are fine so the switch replacement is next. If that doesn't fix it I will opt to ignore the error. try disconnecting the battery for 10 minutes. bad news .. you have to reset your clock and radio presets .. good news this may reset the info ctr computer and get rid of the message providing that the switch fixed the problem . It was explained to me that sometimes the computer gets a hiccup (I think it must be a windows platform lol) and a good old fashioned resetting is all it takes I have a '93 Grand Cherokee. When this same message started to display on and off, I ran to the dealer. After a year and two new switches, the message goes non-stop. I gave up and removed the chime disk in the under-dash box. The message still displays, but I don't have to hear it. I have a 95 GC that has ran the same message for the last 4 years. We have taken it to 3 mechanics and the said take it to the dealership, as they had never head of a 4WD switch. The dealereship didnt have a clue. It turns at the 99% of the time the problem is a bad Vehicle information center. It now constantaly runs a warning that the tail lights are out (even though they are orperating normally), and constantly resets itself back to January 1st at midnight. Not only that, the VIC is interfering with the alarm system, shutting down the starter, and of course causing starting problems. Here us a simple solution. Remove the VIC and throw it in the nearest body of deep water. i just unhooked the connector at the transfer case. cheap and effective. idiot lights are for idiots. Unplug the 4wd Switch Sensor on top of the trasfer case. Tape it up to something secure. Ha i just had the same thing happen to me tonight on my 94 grand Cherokee Laredo. i was like so i put it in N, then the transfercase in N then in 4L then put the trans in 1st, moved forward a couple feet then back into N and back into 4AllTime and it hasent come back on, mind you my jeep has over 175k so i guess that's expected. if you unplug the chime disk then the power doors locks wont lock, anyone else have an idea how to get the chime go away
How do you replace the radiator fan relay switch on a 2002 Jeep Grand Cherokee 4 wheel drive 6 cylinder?
First, isn't that covered in your warranty? Check with the dealer. I bought my '02 Certified Preowned and it was not covered. They wanted $185 to replace the relay. As for… fixing it yourself here is the closest thing I have found... http://autorepair.about.com/library/faqs/bl581g.htm It shows you where the bugger is. I will try to find a replacement part and do it myself. Hi I have done the radiator fan relay replacement ( pulse width modulator) Jeep grand chrokee. First stand in front of the jeep. Remove gently the left front headlamp . A hole will need to be cut in the plastic at the bottom OR you can remove the entire front bumper to access the rad fan relay. New ones are about 120 from the dealer less at discount places . It's the square part with the blue label and wire coming from it. Replace all pieces .. level of difficulty Need to have good mechanical ability New The part Chrysler supplied came with an incorrect diagram and instructions. The note said the "LEFT" headlight and the diagram illustrated this along with a note to remove the air snorkel. Your answer was the correct direction. It is the left headlight as you FACE the car. The headlight was removed by taking out the 10mm stem nut and gently using a pry bar, outside edge first, then inside edge. Trying to remove the headlight rapidly will result in a broken plastic tab that will need to be epoxied.I used my 2" hole saw to create an access by cutting through the headlamp plastic cavity behind the headlight, a strong light will reflect onto the relay and you can see the bracket part below and between the battery and front frame toward the front of the car. With the headlight assembly out, I prised the white ball socket fittings and oiled them for ease of refit. The piece of the cavity was saved because it is critical to keep water out of the relay area. There is a small red tab on the connector of the relay that needs to be pressed and the red tab moved to the side. Then insert a screwdriver into the bottom of the connector to release the black plastic tab that locks the connectors together. Hold the new relay in your hand. Push the red tab back across the connector body and push the two halves together, they will now lock It is critical that a good flat install be performed or the part will fail and you're out $75 and the time to redo it all over again. Use the new screws in the part bag, the old ones will not tighten enough for a good grounding of the part. I used metal duct tape to tape the plastic piece back into the hole and then sealed it with two more pieces. Pressing the headlight assembly back works best if you start from the outer edge and then press the bottom edge in. Addition to New ... I used those instructions and it worked well...couple of things for clarification; after I popped the headlight out, I had to drill the 2" hole in the bottom, left hand side of the headlight compartment. The relay is under that side of the compartment. Once you get that opened up, the rest is fairly simple. Also - my fan stopped operating several months ago. Before I realized it was the fan, I changed the water pump (it died at the same time), serpantine belt and thermostat (the vehicle had 95,000 miles on it, so it was due). It was at that point that I realized it was the fan that wasn't clicking on - I tested the current and it was getting an electrical charge at the appropriate time, but wouldn't kick on. I bought an after-market fan at Advanced for something like $160. It worked like a charm until about a month ago, and then it stopped working again. I took it to the dealer and was told that it would cost $760 to replace the fan and relay. The guy told me that the relay was melted. I didn't believe him, but I bought an after-market relay anyway and changed it tonight. What I found was that the connection between the fan and the relay was melted. So after changing the relay I just cut that connection out and nutted and taped the wires together, wrapping them very well for protection from moisture - and now it works perfectly. Morale of story - before taking your Jeep to the dealer and letting him snow you into a new fan and relay, check that connection; then consider the relay, then consider the fan. You can change each of them yourself with relatively little trouble and keep the $760 for something more fun. the above answer was very helpful. i installed the relay switch in my wife's 2002 grand Cherokee for $65. the jeep was overheating and the air was coming out warm. i thought the fan wasn't coming on so i replaced the switch and it fixed the problem. thanks 2009-07-26 All is correct; however, I was unsure were to cut, I used a flashlight & mirror to search for the relay behind the plastic portion of passenger side headlight cavity. The outside edge of the hole that you will need to cut starts about 3-4 inches from the outside edge of the cavity, this will make your center being about 7-8 inches from the edge. The relay is on a slope and you will need an elbow extension or will need to cut more plastic closer to the front of the vehicle - best of luck It appears that the relay (which is a solid state [think transistor] unit) is subject to heat failures. When I replaced mine I used a paste that is made to help conduct heat from solid state devices to heatsinks. That helps conduct the heat from the relay to the metal frame. The paste is a white silicon based material made by Wakefield and available from electronics parts distributors. I think that Radio Shack still carries it in a small, less than an ounce tube that will suffice for a couple of these relays. Addition to answer: In trouble shooting I still found that I had 12 volts at the fan. Therefore I thought it was the fan motor not working. I bought two new fans neither one worked. I did not install them. Just plugged them in. The fan relay switched had already been replaced 3 years earlier with an after market from Oreily. It turned out to be the relay again. It was allowing 12 volts but could not handle the motor load. Oreily gladly replaced the switch with their life time warranty. Only out a few hours of time being stranded and chasing around for fan motors.
The switch is on top of the transfer case on the drivers side. When you replace it make sure you put the rubber o ring off the original on the new one.To clear the codes disco…nnect both negitibe and positive battery cables for a couple of minutes. FYI I put one on mine but the display still says "service four wheel drive switch" seems there is a problem with these couold be the vehicle display it self. This is usually the VIC: I have a 1995 Jeep Grand Cherokee Loredo with the annoying "Service 4 Wheel Drive Switch" that goes off every 10 minutes or anytime. I have search for 3 years to find what has been causing this. I am glad to say that I have located the problem and I am sure most of you that have this problem have the same issue. It is the VIC that is causing the error. You need to pull the VIC out and take it to a bench and open it up. Inside you have 2 circuit boards; one is folded over with the connector that hooks up to the vehicle on it. This is where the problem is. You need to locate the back solder points of the connector, clean of the conformal coating that is painted on, by scratching it off. Now re-solder all the connector solder joints. After ageing and vibration these joints become intermittent. If your VIC is going off intermittently this is probably your problem. I re-soldered my VIC, installed back in the car and have not had one error since. If you are not comfortable soldering, take it to someone who does. You do not want to use a solder gun on this, just a soldering iron. This will take care of the "Service 4 Wheel Drive Switch" error.
Answer there is a possibility that your shift linkage is messed up. if not that then it is a sensor.
What damage can happen to a 1993 Jeep Grand Cherokee Laredo if you switch from 4 hi to 4 lo wheel drive while the engine is in drive?
Answer I bet it made a nice grinding sound didnt it? Yes, it can if you are going too fast. If it actually goes into low gear it will seriously spike the r…pms and potential valve and lifter damage. This is what a rev limiter helps avoid though. If the engine sounded like it started sputtering when this happened then it is a good thing. It is one of those situations that you just have to let it go to see if it breaks. Good luck.
The 4 wheel drive switch is located on top of the transfer case
To fix this problem you must change your differentials recommend going to JIFFY LUBE. It takes only 15-20 minutes and about $180 but its its worth it. Believe me i have had m…y jeep for about 10 years all ready ,and i got annoyed with the "Beep Beep Beep" sound .I Took it to many mechanics and they end up "fixing" the wrong thing. Until i took my car to Jiffy Lube and they explained to me what was the problem ..... I WAS SATISFIED =)
That depends on exactly what Jeep you have. Most 96's were the Quadra-trac system, in which case you are in 4 wheel drive all the time! To put it in low range (For only …the nastiest conditions- dont use this for normal driving on the street) you need to stop the vehicle, put it in nuetral, and pull the transfer case lever (next to the shifter) firmly and quickly to the "4LO" position. If you have a "select trac", i believe you just pull the lever to 4 wheel drive, and away you go!
You can't. The 1994 JGC has Quadra Trac, all the time 4 wheel drive. It should never go into 2 wheel drive. If it does, have your Jeep looked at immediately.
Pull the lever that is just left of the shifter. If your vehicle is not going into 4WD then you should make sure all tires have the same tread depth and that your transf…ercase has fluid in it.
No you can not, The frame is designed different on a 4-wheel drive.
To permanently disable, remove the drive shaft from the transfer case to the front differential.
That is the type of 4wd you should only use part time, when off road or very icy conditions. Not for use on dry pavement.
NO. The center shaft that runs through the transmission is longer on 4x4 transmissions so the transfur case will slide up on it. The tail shaft housing has NOTHING to do with …it.
How do you replace the radiator fan relay switch on a 2002 Jeep Grand Cherokee 4 wheel drive 6 cylind?
remove the front bumper & its bolted to the body under the passenger side headlight, dumb spot but it' very important to fix it asap before the motor develops a knock from run…ning too hot
\n. Look underneath for a drive shaft that goes from the transfer case to the front axle. If it has one, it is four wheel drive.