Starter problems - electrical malfunctions -
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Starter problems - electrical malfunctions

FS: Wrangler RGB Multicolor Fog Light LEDs: Awesome EffectBlack Magic Brakes is having an extended Black Friday Sale6th annual beat your wife to the credit cards sale!!

Unread 05-02-2013, 10:57 AM   #1
Registered User
1995 YJ Wrangler 
Join Date: Oct 2011
Location: , Colorado
Posts: 37
Starter problems - electrical malfunctions

My starter sometimes runs while I'm driving. If I'm coming down a hill, or up to a stop, and I'm letting the engine brake me, the starter will begin to run, but the gear won't engage. It just spins non stop for about 10 or 15 seconds - sometimes I have to disconnect the battery or hit it with a hammer or something. It does this once or twice a month. Something is giving it the signal to run, and power to do so, when it shouldn't.

Also, under the same circumstances (engine braking at 2500-3000 RPM), my lights will sometimes flicker and dim very briefly, radio might cut out for a half second, and then it all comes back.

I'm rather stupid electrically, and I'm afraid there's something wrong in the wiring maybe. This all started when I replaced the starter about a year ago. It's installed correctly, and even if it was messed up, would that somehow affect the other systems as well?

4cyl 2.5L
stock everything

ruckerbo is offline   Reply With Quote Quick reply to this message
Unread 05-02-2013, 11:10 AM   #2
Registered User
1991 YJ Wrangler 
Join Date: Apr 2008
Location: Meridian, Idaho
Posts: 2,554
Have you tried removing your starter relay when this happens to see if the starter shuts down? If it does, then either the relay or something further up stream (ignition sw) may be at fault. If it continues to run and you are sure the brown wire is not shorting to anything, then first guess would be a bad starter with internal/intermittent short. Especially if smacking it causes it to stop. Weird though, that your starter does not engage the fly wheel when this happens. I would address this first, then worry about the lights if that problem remains after the starter issue has been fixed.
idaholtby is offline   Reply With Quote Quick reply to this message
Unread 05-02-2013, 12:09 PM   #3
Registered User
1994 YJ Wrangler 
Join Date: Oct 2011
Location: Reno, Nevada
Posts: 487
Just a stab here, but have you pulled the starter out and checked it? There could be a short that is allowing the motor to engage without the key. If my memory is correct, i believe the hot wire from the battery drives only the starter. If this is shorting out, it would cause the starter to spin, without engaging the flywheel.
jsipe007 is offline   Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. is not in any way associated with Jeep or the Chrysler Corp.