10th Apr 2007, 06:31

I also have a 1994 Grand cherokee limited with 141,000miles on it and the Service 4wheel drive Switch comes on, along with the annoying beeps. sometimes it comes on even with the vehicle off! I am guessing it is just a loose wire somewhere. I would just ignore it and forget about it. as we all know it is very annoying and nobody seems to know how to fix it. INCLUDING THE DAMN DEALERS! You would think they might have some kind of idea on how to fix it, but nope. They are just there to make money. However I have found that screaming at the top of your lungs at it sometimes can do the trick. hope I have been some help. P.S. Be Good to your BEEPIN JEEP.

19th Apr 2007, 11:20

I am the proud owner of a 1994 Jeep Grand Cherokee Limited. It's been a very reliable vehicle. I have experienced a few minor things, the latest is a flashing "Service 4WD Switch" on the console display panel, there is no beeping at this time. My mechanic had not seen this service warning before. but it was not the first time I had experienced a false alarm, from this display. Going over rough surface seems to be the trigger. I would guess it's a wiring issue, or possibly that this system is failing, simply due to it's age. nothing lasts forever. If it did we couldn't afford it. My "Key-less Entry" no longer works, which may be connected to the "Service Notice Chime", or "Beep". I'll get it figured out, until then I have to use the key. I have also noticed, It doesn't like the cheap gas. But that's A small price to pay, for the years of service, and fun my Grand Cherokee has provided. A Jeep is not made, it's built. Donnie M. Brandon FL.

24th Apr 2007, 07:59

I finally found others with the "service 4 wheel drive switch" warning. I have 218,000 miles on the vehicle and it runs fine. Have had to replace several parts such as water pump, fuel filter, front wheel struts.

My mechanic (independent) says he called the jeep organization and they told him that it is a "glitch" in the system. The beep is annoying.

3rd May 2007, 07:25

I also drive a 1995 Jeep Grand Cherokee Laredo, and have approximately 162,000 miles on it, and it has recently started to display the 4X4 switch needing serviced. My local Jeep dealer's mechanic said to flush the transfer case and replace the fluids. I am not to sure if that will work after reading all of the comments, so I have decided to do it myself. If it works to any degree, I will post it on this site.

L. Avery Pekin IL.

10th Jul 2007, 14:11

My nephew just bought a 96' Grand Cherokee with 105k miles on it. He just told me that it said "Service 4 Wheel Drive Switch" on the computer screen. He of course has shifted all through the 4 wheel options and they all work, but the warning error still comes up.

I was researching this problem, and it seems as though a lot of people have the same issue. His Jeep has the digital read out and not the display with the picture of your Jeep in white. So this tells me that the issue is not in the computer unit itself, since two different computer types have the same error issue.

Also by process of elimination, replacing the switch does not seem to work for anyone, nor does replacing the fluids. The problem has to be in the wiring from the switch to the control PCB, or where ever the wires go.

I have been working on Jeeps for quite some time, but have not done much to Grand Cherokees. The problem with taking the Jeep to the dealer is that the dealer technicians are only going to go so far to diagnose the problem. They are trained to replace parts and follow what their computer tells them to do, and tells them what is wrong.

I am an electronics engineer, and I am going to stick my neck out here, and say that I will do my very best to find out what is going on with this issue, and then post it on the web and back on here as well. I will keep you posted on what I find.

I am going to start by getting the wiring schematic and go from there. I will probably start at the switch itself, and trace the problem to its source. Wish me luck! Sounds like I might have a better chance winning the lottery! Just kidding. We will figure it out... Or go crazy trying!

12th Sep 2007, 10:29

I too own a 1994 Grand Cherokee Laredo with 203,000+ miles on it. I have been getting the "Service 4WD switch" message for about a week now on the digital display. It is very comforting to see the comments on this site and detect a common thread -- mostly '94-'96 Jeeps (many GC's) around or over 200K miles. It seems that as of right now (9/12/2007) noone knows for sure what causes the problem or how to fix it. I guess I'll keep ignoring it (it comes on sporadically, not all the time) and keep checking back to see if anyone comes up with a fix.

19th Sep 2007, 08:25

I just bought my son a 1994 Grand Cherokee Laredo with 94k miles. Loving it so far. However, despite all efforts, the display will read that "coolant is low " Anyone else have this issue?

3rd Oct 2007, 19:47

Well, I have a Laredo 94 with 320,000 miles. This Switch service appeared yesterday when I hit a bump. It comes on then goes off. I have had many problems with the Jeep and this just adds to the frustration. As far as the low colant light I recommend checking the colant sensor. My biggest unsolved issue is my backup lights that don't work. But after a ear of dealing with it I have gotten used to backing up really SLOW!!! I wonder what happened to the electrical experiment guy...

5th Nov 2007, 20:39

Okay, I don't own a Jeep, I own a 2001 Dodge Durango and I am having the same problem with my service 4 wheel drive light on. But since that light has come on, the radio switch on the back of my steering wheel wont work, and also the back windshield wiper won't work. Just so you know not just Jeeps are having this trouble; so are Durangos. It drives me crazy; also it actually quit beeping, but the light stays on all the time unless I unhook the battery; then it stays off for a little while, but eventually comes right back on.....