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  #13  
Old 11-17-2011, 11:05 PM
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Re: service 4wd system - won't start-HELP

Keep it on the charger cause that thing cant hold a charge and it WILL freak out on you soon
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Old 11-17-2011, 11:09 PM
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Re: service 4wd system - won't start-HELP

If you are still getting warning lights after a new battery is installed:

Insert and turn the ignition key from "Off" to "On" three times, moderately fast and without pausing ("ON" is when the digital odometer displays):
Tip: use the "count to 5" method, where "1" is the first "On":
Off > On > Off > On > Off > On
0 1 2 3 4 5
0 - Insert key (Off)
1 - On
2 - Off
3 - On
4 - Off
5 - On At the third "On" the odometer display will read "DTC REPORT" and list the codes. If no codes are present the message "Done" will appear.
If you do get a code, you can look it up on this link:
http://www.wkjeeps.com/trouble_codes.htm

Hopefully, it is just the battery.
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Old 11-17-2011, 11:28 PM
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Re: service 4wd system - won't start-HELP

your battery could have also been killed by a dead or dying alternator so i would certainly check that asap....... they are super easy to change as well.
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Old 11-19-2011, 02:28 AM
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Re: service 4wd system - won't start-HELP

The service 4wd lamp was likely more of an indication of communication failure not peticularly a fault. your CEL should clear by replacing the battery.
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  #17  
Old 11-19-2011, 01:51 PM
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Re: service 4wd system - won't start-HELP

Again, thanks for the replies.. I got a new battery, checked the alternator and everything is working as it should be. Just weird that my battery died, I know they do, but just surprised..
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Old 11-19-2011, 03:47 PM
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Re: service 4wd system - won't start-HELP

These things are feel moody when it comes to batterys, mine was fine before it just randomly gave up on me. Stuff happens, just be glad it was just a silly problem and not a bigger one lol
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Old 01-22-2012, 10:53 AM
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Re: service 4wd system - won't start-HELP

This is a great site. Yesterday I am driving along and "service four wheel drive system" comes on which concerns me. Then the next morning I go out and the battery is too low to turn it over. I feel relieved reading this thread. I will head out and get a new battery today.

.....update....problem fixed.

Thanks
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Old 01-22-2012, 02:19 PM
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Re: service 4wd system - won't start-HELP

It's definitely the battery as stated above...

When the voltage gets unstable the Jeep's electronics do some crazy things...the service 4wd message is a fairly common one.

To clear the codes, isolate the negative terminal on the battery and leave it for 20min (or once it is unhooked, hit the brake for a few seconds to discharge what's left in the system).

Codes should be cleared when you re-attach and start it up.
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