Voltage problem - JeepForum.com
Search  
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 JeepForum.com > Models > Jeep CJ Forum > Voltage problem

Engo LED Flush Mount Lights *PAIR* Flood or Spot 1,600 LumYukon Ultimate 35 axle kit for c/clip axles with Yukon ZipRockridge 4WD IS Taking Zone Offroad Suspension Lift Kits

Reply
Unread 12-11-2013, 06:12 PM   #1
ChrisCarlock
Registered User
1982 CJ7 
 
Join Date: Jul 2012
Posts: 150
Voltage problem

I replaced my alternator, belt, and all pulleys are good. My ground is good.

My volt meter drops as I turn on accessories and then my belt begins to squeal when not under load. Could this be my battery? Gauge flickers with blinker

ChrisCarlock is offline   Reply With Quote Quick reply to this message
Unread 12-11-2013, 07:10 PM   #2
86cj74.2L
Web Wheeler
 
86cj74.2L's Avatar
2004 WJ 
 
Join Date: Jul 2006
Location: Stouchsburg, PA
Posts: 6,764
Tighten your belt more.

I usually tighten Grammys to the point that I turn on all the accessories at once and don't get the belt squeal. Anything tighter then that is prematurely wearing out your alt bearings.

Don't go by the factory volt meter. The meter is sensing its voltage through the ignition switch. And on our CJ's all the electrician load goes through one set of contacts and it drops a lot of voltage.

I ran a wire directly from the battery to the cigarette lighter and use a volt meter for the cig lighter from innova its a lot more accurate then the gauge on the dash.

I also set my idle so I see 13v with all the accessories on. Lights, heater fan, etc.
image-4190580978.jpg

86cj74.2L is offline   Reply With Quote Quick reply to this message
Unread 12-11-2013, 07:28 PM   #3
BagusJeep
Web Wheeler
 
BagusJeep's Avatar
1981 CJ7 
 
Join Date: Jul 2009
Location: Bali, Indonesia
Posts: 4,532
Check your belts again, they wear on the sides and a ridge forms. Eventually the base of the belt contacts the pulley and you start to lose grip, hence they start to squeal even though they are tensioned and look fine.
__________________
BagusJeep lives in Bali, the Land of Temples.
With a Jeep every prayer counts.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1995 Cherokee 4.0 - CHEROKEE
BagusJeep is offline   Reply With Quote Quick reply to this message
Unread 12-11-2013, 07:28 PM   #4
ChrisCarlock
Registered User
1982 CJ7 
 
Join Date: Jul 2012
Posts: 150
My belt is on there nice and tight and I still have the problem. I'll try setting idle higher
ChrisCarlock is offline   Reply With Quote Quick reply to this message
Unread 12-11-2013, 08:39 PM   #5
LumpyGrits
Registered User
1985 CJ7 
 
Join Date: Jul 2010
Location: The Mojave Desert Palmdale Ca. U.S.A.
Posts: 5,092
Get a new belt
LG
__________________
Have'n you along, is like loose'n 2 good men
LumpyGrits is offline   Reply With Quote Quick reply to this message
Unread 12-13-2013, 03:59 AM   #6
RWise
Registered User
1981 CJ5 
 
Join Date: Mar 2012
Location: Oakhurst, Oklahoma
Posts: 574
Quote:
Originally Posted by LumpyGrits View Post
Get a new belt
LG
X2, and I would make it the groved belt, they get more traction than smooth belts thus extending bearing life. If the sides of the pulleys are worn, no new belt or any amount of tention will fix it. The belt (new or used) should set at the top of the pulley, not sunk into the v slot of it.
RWise is offline   Reply With Quote Quick reply to this message
Unread 12-13-2013, 04:50 AM   #7
Blakescj7
Registered User
1985 CJ7 
 
Join Date: Sep 2013
Location: Tulsa, Ok
Posts: 314
hey 1981 cj5, nice to see another oklahoman on here. i was beggining to think i was the only one haha
Blakescj7 is offline   Reply With Quote Quick reply to this message
Unread 12-14-2013, 06:05 AM   #8
RWise
Registered User
1981 CJ5 
 
Join Date: Mar 2012
Location: Oakhurst, Oklahoma
Posts: 574
Quote:
Originally Posted by Blakescj7 View Post
hey 1981 cj5, nice to see another oklahoman on here. i was beggining to think i was the only one haha
Well I stop in from time to time, to many interestes and not enuf time or money for them. Do you get to TOR (Tulsa Off Road) several locals there, and local events posted, etc. Oh ya Tulsa is just outside of Oakhurst, with way more rules! You are not alone!!
RWise is offline   Reply With Quote Quick reply to this message
Unread 12-14-2013, 07:36 AM   #9
Blakescj7
Registered User
1985 CJ7 
 
Join Date: Sep 2013
Location: Tulsa, Ok
Posts: 314
havent heard of it. ill look into it.
Blakescj7 is offline   Reply With Quote Quick reply to this message
Unread 12-29-2013, 08:16 PM   #10
mrpete
Registered User
1981 CJ7 
 
Join Date: Feb 2011
Location: Baytown, Texas
Posts: 3
Possibly when the alternator was changed, the new one had a narrower groove width pulley. On my '81, the PO changed the alt. and the belt sticks out of the groove. It slips and squeals sometimes. I am restoring my Jeep and am going to a 1/2" wide pulley. The pulley on mine is currently 3/8".
mrpete is offline   Reply With Quote Quick reply to this message
Unread 12-30-2013, 05:41 AM   #11
John Strenk
Moderator
 
John Strenk's Avatar
1976 CJ5 
 
Join Date: Feb 2005
Location: Shalersville Ohio
Posts: 13,011
While tightness is important, IF the belt is running on the bottom of the v-grove in the pulley, you can't get it tight enough.
John Strenk is offline   Reply With Quote Quick reply to this message
Unread 12-30-2013, 04:17 PM   #12
JeepHammer
Running On Empty...
1973 CJ5 
 
Join Date: Aug 2007
Location: South West Indiana
Posts: 10,204
That was going to be my next question John...

Does the sides of your pulley bow out and not have a straight 'V' in it anymore? If so, time for a new pulley.
Does the belt bottom out in the pulley? If so, time for a new, or wider belt.

If you are worried about wearing out an alternator bearing, then you don't have the problems with a CJ that I do!
JeepHammer is offline   Reply With Quote Quick reply to this message
Unread 12-30-2013, 06:04 PM   #13
86cj74.2L
Web Wheeler
 
86cj74.2L's Avatar
2004 WJ 
 
Join Date: Jul 2006
Location: Stouchsburg, PA
Posts: 6,764
If the bottom of the groove is shiny the belt is riding too low and the shive/ pulley should be replaced. Or the belt is the wrong profile.
86cj74.2L is offline   Reply With Quote Quick reply to this message
Unread 12-30-2013, 08:20 PM   #14
scottymac62
Registered User
1977 CJ5 
 
Join Date: May 2008
Location: Locust Grove, GA
Posts: 1,464
Check your connection where your alternator cable meets the solenoid. This is also where the red, 12v chassis supply cable is present. An easy way to do this is see if the connection gets hot after only a few moments. If it does get hot then I suggest re-terminating them with a crimped wet/solder connection. I had the same problem on my CJ5 and have never had another voltage problem since re-terminating that connection. I also did the JeepHammer battery cable upgrade at the same time. It's very amazing how a CJ acts when you feed her a proper 12v and ground.
__________________
'77 CJ-5 Renegade 304 / T-150, Dana 20, 30/20 axles, Aussie Locker in the Dana 30, American Racing 15x10 Outlaw II's, 33" Dynapro M/T's" ,Optima Battery, TeamRushed + Summit Racing CDI ignition, FlowKooler water pump, Edelbrock Performer Intake Manifold, Holley 4160 390cfm, Herculiner, Silver Ceramic Coated Hedman Hedders, Flowmaster 40's.
Warn PowerPlant HD 12K Winch, Dirtworx front and rear bumpers.
scottymac62 is offline   Reply With Quote Quick reply to this message
Unread 12-30-2013, 08:39 PM   #15
86cj74.2L
Web Wheeler
 
86cj74.2L's Avatar
2004 WJ 
 
Join Date: Jul 2006
Location: Stouchsburg, PA
Posts: 6,764
Also don't rely on the volt meter as a accurate I indication of battery voltage.

All the electrical load goes through 1 set of contacts in the ignition switch. That also goes to the volt meter. That sense wire is comprised by a high load and poor contact.

I ran a wire directly from the battery to the cigarette lighter. And use a volt meter that plugs into it.

Its from Walmart. Cost around 10 dollars.

As JH said to me once. If it constantly ran at 12.5 volts the battery would be dead by now. And it wasn't.
image-4102336872.jpg

86cj74.2L is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

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. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.