Gen Light and volt meter - Jeep Cherokee Forum
Jeep Cherokee Forum

Go Back   Jeep Cherokee Forum > Technical Discussion > OEM Cherokee Tech
Log In 
Search


Gen Light and volt meter

Reply
 
 
 
 
Thread Tools Search this Thread
Old 11-04-2009, 06:09 PM   #1
Newbie
 
Join Date: Jun 2009
Location: St. Charles, MO
Posts: 7

View stchasxj's Photo Album My Photos
1996 Cherokee
Default Gen Light and volt meter

Charging issue is driving me nuts. The gen light came on and volt meter pointed to left (low charge). Charged battery and had it and alternator checked off vehicle. Both checked ok. Cleaned terminals put back together showed close to 14V on meter. Drove to work 2 days and gen light came back on and voltmeter is low again. Voltmeter dropped to red then came back to about halfway to 14V. Checked battery and alternator on vehicle. Tested okay again. Any ideas what might be the issue? Forgot to add, 1996 Cherokee Sport with 6 cyl.
stchasxj is offline   Reply With Quote
Join Cherokee Forum

Join CherokeeForum.com Today - It's Totally Free!

Do you love your Jeep? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Jeep Fans to meet online.
Once you join you'll be able to post messages, upload pictures of your jeep, and have a great time with other Jeep Cherokee fans.. Whether your an old timer or just bought your Jeep you'll find that CherokeeForum.com is a great community to join. Best of all it's totally free!

Join CherokeeForum.com Today! - Click Here JOIN FOR FREE


-->
Old 11-04-2009, 06:11 PM   #2
Senior Member
 
radio flyer's Avatar
 
Join Date: Feb 2009
Location: Highlands Ranch Co.
Posts: 715

View radio flyer's Photo Album My Photos
1985 shell Cherokee
Default

When it drops crawl underneath and tap on your alt. if it starts charging- problem located- Time for a new alt.
__________________
Got Mountain ?
WHEELING-----Embrace the sickness
http://www.panoramio.com/user/4981821 Click here for my wheeling trips!
http://youtu.be/F3T0ZSplDss Latest project!
radio flyer is offline   Reply With Quote
Old 11-04-2009, 06:28 PM   #3
Senior Member
 
RenoXJ's Avatar
 
Join Date: Jul 2008
Location: Reno, NV
Posts: 802

View RenoXJ's Photo Album My Photos
98 Cherokee
Send a message via AIM to RenoXJ
Default

So when the stock gauge drops, did you test voltage at the battery with the volt meter (hand held) ?
__________________
MY XJ BUILD: http://www.cherokeeforum.com/f46/jeep-noobs-xj-3924/



AIM ME: 24/7 LILBLUECRX
RenoXJ is offline   Reply With Quote
Old 11-04-2009, 06:29 PM   #4
Newbie
 
Join Date: Jun 2009
Location: St. Charles, MO
Posts: 7

View stchasxj's Photo Album My Photos
1996 Cherokee
Default

I did not check the voltage with a hand held meter.
stchasxj is offline   Reply With Quote
Old 11-04-2009, 06:32 PM   #5
Senior Member
 
RenoXJ's Avatar
 
Join Date: Jul 2008
Location: Reno, NV
Posts: 802

View RenoXJ's Photo Album My Photos
98 Cherokee
Send a message via AIM to RenoXJ
Default

OK. well do that. If you dont have one, your local harbor freight tools has a really good lil handheld unit for like 4.00 cant beat it. with the engine running test the voltage at the battery that will tell you if your ALT is working.
__________________
MY XJ BUILD: http://www.cherokeeforum.com/showthread.php?t=3924



AIM ME: 24/7 LILBLUECRX
RenoXJ is offline   Reply With Quote
Old 11-04-2009, 06:41 PM   #6
Newbie
 
Join Date: Jun 2009
Location: St. Charles, MO
Posts: 7

View stchasxj's Photo Album My Photos
1996 Cherokee
Default

Voltmeter read 12.2. Shouldn't it be 14 or so?
stchasxj is offline   Reply With Quote
Old 11-04-2009, 06:48 PM   #7
Senior Member
 
RenoXJ's Avatar
 
Join Date: Jul 2008
Location: Reno, NV
Posts: 802

View RenoXJ's Photo Album My Photos
98 Cherokee
Send a message via AIM to RenoXJ
Default

Yep it should. Sounds like your ALT isnt charging. and your gauge and light are correct
__________________
MY XJ BUILD: http://www.cherokeeforum.com/showthread.php?t=3924



AIM ME: 24/7 LILBLUECRX
RenoXJ is offline   Reply With Quote
Old 11-04-2009, 06:49 PM   #8
Seasoned Member
 
Join Date: Sep 2009
Location: East Texas
Posts: 454

View ET JEEP's Photo Album My Photos
1997 Grand Cherokee
Default

With engine not running you should read about 12 volts. With engine running and alternator charging you should see 13-15 volts.

If you do not read 13-15 volts at battery test your alternator. Connect red meter lead to the large terminal, thick cable, at rear of alternator and black lead to ground. With engine running you should read 13-15 volts.
ET JEEP is offline   Reply With Quote
Old 11-04-2009, 07:18 PM   #9
Newbie
 
Join Date: Jun 2009
Location: St. Charles, MO
Posts: 7

View stchasxj's Photo Album My Photos
1996 Cherokee
Default

Checked the alt and get the same 12V reading. Guess it's time for a new alt. Thanks all.
stchasxj is offline   Reply With Quote
Old 11-05-2009, 07:49 AM   #10
Seasoned Member
 
Join Date: Sep 2009
Location: East Texas
Posts: 454

View ET JEEP's Photo Album My Photos
1997 Grand Cherokee
Default

Have your alternator bench checked. It could be good and you have a voltage regulator problem. More than likely it is the alternator. If you buy a replacement alternator, have it bench checked before you leave the store. Also check the pulley to make sure it is the correct one.

I purchased a Dodge truck alternator, had it bench checked, all good. Installed it and the pulley was not the right one. I had to take it off go back to the store and replace pulleys.
ET JEEP is offline   Reply With Quote
 
 
 
Reply

Go Back   Jeep Cherokee Forum > Technical Discussion > OEM Cherokee Tech



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 09:48 AM.


This site is in no way affiliated with Jeep or Chrysler.

Emails Backup