Question about 2008 Jeep Wrangler

1 Answer

Jeep wrangler electronics went haywire?

Cabin fan was cutting out as the first thing noticed. Then when driving, wipers, windscreen sprayer, horn and door locks started going on and off. Pulled car over and turned off.tried to restart no go. Disconnected battery to try to reset computer, didn't work. Now when battery is connected, horn stays on and wipers move erratically. Any suggestions?

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    MVP:

    An expert that got 5 achievements.

    New Friend:

    An expert that has 1 follower.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Contributor
  • 33 Answers

I had the same problem and believe it or not it was a running light out

Posted on Mar 25, 2013

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Ad
  • 159 Answers

SOURCE: Electrical short or computer? Horn, flashers, door locks

Sounds more like a ground issue,there are several grounding blocks and points all over.

Posted on Oct 03, 2009

  • 1 Answer

SOURCE: Horn, windshield wipers, windshield cleaner randomly going off

I am having the same problem on my 08 wrangler sahara unlimited. I was told it was because of a loose battery connection. I checked and the connections are fine.

Posted on Oct 07, 2011

  • 449 Answers

SOURCE: my 92 jeep wranglers windshield wipers stopped working

the wiper needs to be tighten some more, there is a nut that holds the wiper to the motor tight that nut.

Posted on Dec 21, 2009

  • 76 Answers

SOURCE: MY 1999 JEEP CLASSIC AIR BAG LIGHT STAYS ON &

clock spring is bad

Posted on Feb 28, 2010

Testimonial: "Thanks a million, but where is the clock spring located & can I change it myself? "

ZJLimited
  • 17970 Answers

SOURCE: 1990 Jeep wrangler no start

Are you check fault codes there? First check, no crank or no start condition is an easy thing to diagnose. Beyond the battery stuff, you need to know if power is at the starter solenoid, and being switched to the starter motor with the key in the crank position. Rrequires two people and a test light. If power goes to the starter motor, and no crank, then starter is bad. If no power there, then there's issues with wiring, fuses, ignition switch, clutch switch and so on.

Remember the basics for no start issues. An engine needs three things to run normal:
1) Compression
2) Fuel
3) Spark

At some point, your not getting one of those three things. First, isolate the problem. Will it crank over? If not, probably battery or connections, or locked up starter, etc...

It will crank but not start - very common. Crank it over for a few seconds and pull one spark plug, is it wet with gas? If no, then your not getting fuel. If yes, your not getting spark. Test for spark with the plug out, if no spark, focus on the electrical systems. If there is spark, focus on the fuel system. This narrows your troubleshooting by 50% to not waist time.

Based on spark or no spark, you should be able to continue troubleshooting each system. For no spark, check coil, check wires, check ignition, check grounds, test each component, check for wore wires sparking on the block before it hits the plug, change plugs, change distributor cap and rotor, etc... Somewhere, there will be a breakdown in the system.

For no fuel, check your fuel pump (does it growl when you hit the key to on?), fuel filters, power to the injectors, fuel lines, etc...

In the rare case that you do have spark, and you still have a wet spark plug, there is most likely water in the fuel system or your plugs are fouled and should be replaced.

Just the basics I can think of off the top of my head... Most of the no start issues I encounter are either an old battery that will not keep a charge anymore (usually older than five years) or loose cables. Loose cables and dirty terminal connections make up about 90% of the problems with starting. ALWAYS check those first, pull 'em off the battery and clean with sandpaper or a wire brush to ruff 'em up really good. Same inside the terminal connector then lock 'em down.

You need to do a little investigating. Run it for a while to get the engine warmed up, then shut it off somewhere that you have some test equipment and help available. Make sure it won't start, then spray a little starting fluid into the air intake while a helpe tries to start the engine. If it starts briefly you know that there is a problem with fuel delivery and you can start checking out the filter, fuel pump, relays and electrical circuits that feed the fuel pump. Remember that even NEW fuel pumpscan have a problem so don't rule out that one.

If it WON'T start with the help of starting fluid, pull a sparkplug wire and connect it to a spare sparkplug. Set the spare sparkplug with the wire attached on a metal part of the engine and have your helper try to start it again. If you don't have a nice, strong spark, you know there is a problem in the ignition somewhere. If there isn't a spark, check the coil input. Connect one end of a volt meter to ground and the other end to the coil input. One side of the coil input should have constant voltage, the other side should be intermittent while the engine is cranked by your helper. If you're getting voltage TO the coil and intermittent voltage on the other side, but no spark, you probably have a bad coil that fails when it gets hot.

Good luck.

Posted on May 29, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

97 jeep cj windows and wipers stopped working fuses are ok


97 wrangler right? CJ ended in 86 (last year)
97 TJ, you mean, or was posting to Cherokee correct all along./?????
factoid:
The Chrysler Corporation bought out AMC in 1987, shortly after the Jeep CJ was replaced with the AMC-designed Jeep Wrangler or YJ.


test the fuse, looking only finds the ones blow to H3LL
they can in fact just crack a bit. and are in fact bad.
use any DMM or any ohmmeter, "resistance Rx1 or RX2 range , low range) 0 ohms good, , infinity bad.
only that works. every time.
lets read the FSM together.
http://www.jeep4x4center.com/knowledge-base/index.htm?utm_source=cj#service
wipers first. USA not export.
Front wiper not rear. ok>?
page 8w-53 wiper schematic.

fuse 2 and 3 must be good.
then fuse 14 front wiper ,fuse 12 is rear
if the fuses are good, (truely) we never ohm fuses we use VOLTS
on both sides of fuse, volts never lies.
then what is bad, easy bad wiper switch, motor or ground to motor.
the voltmeter again wins the toss and if no 12vdc to motor
then the switch or wire are bad.
if you have 12v to motor then motor is bad , if ground to motor is no cut.

now windows. what windows, are then not crank windows or zipper windows?

i think you posted wrong car,,

Mar 20, 2014 | 1997 Jeep Cherokee Country

3 Answers

Where is sensor located


where is fan sensor located

Jan 13, 2014 | 2008 Skoda Octavia 1.9

2 Answers

Jeep wrangler wiper fluid will not dispense on front windsheld but will on the rear


Switch is faulty is the first thing comes to my mind. Your spot on tho in your diagnosis, although you may have two pumps and tanks, one for front, one for rear. I would check all my fuses just to be sure, and I would look at all my waster tubes and make sure they are not clogged, check your nozzles too, as sometimes wax can clog them up.

Dec 16, 2013 | 2008 Jeep Wrangler Rubicon

1 Answer

Horn, windshield wipers, windshield cleaner randomly going off


I am having the same problem on my 08 wrangler sahara unlimited. I was told it was because of a loose battery connection. I checked and the connections are fine.

Aug 01, 2010 | 2008 Jeep Liberty

2 Answers

2008 wrangler 4 door. windshield wipers are stuck


2008 should be under warranty, take it back to dealer.

With all of the electronics on vehicles today, seems like these sort of system failures are becoming commonplace.

Sep 24, 2009 | 2008 Jeep Wrangler

1 Answer

08 wrangler electrical issue


isnt it still under warranty? Take it in and get it fixed for free.

Jun 28, 2009 | 2008 Jeep Wrangler

1 Answer

98 Jeep wrangler, fan/air won't cut off


Replace the blower motor resistor. You can unplug the fan till you get one. Usually located behind the glove box.

Jun 10, 2009 | 1998 Jeep Wrangler

2 Answers

Locate the cabin air filter for a 97 jeep wrangler


No cabin filter in a 97 Jeep Wrangler.

Apr 04, 2009 | 1997 Jeep Wrangler

Not finding what you are looking for?
Cars & Trucks Logo

180 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts

yadayada
yadayada

Level 3 Expert

78267 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...