International Full Size Jeep Association
Home Forums Reader's Rigs Tech Library Trail Stories FSJ-List
International Full Size Jeep Association  

Go Back   International Full Size Jeep Association > Tire Kickin' > General FSJ Tech

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 12-28-2005, 05:40 PM
Faktory_Flaws's Avatar
Faktory_Flaws Faktory_Flaws is offline
Banned
 
Join Date: May 02, 2005
Location: Portland Oregon
Posts: 265
Post

First off Sorry for being gone so long. (like anyone missed me) Just got the new house set up and the phone and net turned on.

Ok Any way. My battery has been going dead when I drive at night. On the way home last night I was driving through a dark nieghborhood and all of the sudden my headlights got really bright, and they flashed out. The lights are toast. Will a new alternator fix this problem?
Reply With Quote
  #2  
Old 12-28-2005, 05:58 PM
DanHS's Avatar
DanHS DanHS is offline
 
Join Date: Aug 29, 2004
Location: Baiting Hollow, Long Island NY
Posts: 5,268
Post

Sounds like the headlights might be shorting out somewhere, I'd check that first
__________________
'84 Grand Wagoneer 360/727/229, 32" General ST's and 36" Swampers, 3" lift, TFI/Mallory 6AL, CS 144, Taurus fan, custom bumper, and custom 'bodywork'. Soon to have 6" lift

'79 Cherokee S 360/T15/D20, rusting away while I figure out what to do with it

'91 Final Edition GW in Spinnaker Blue!

My FSJ pics

FSJ Grille Identification
Reply With Quote
  #3  
Old 12-28-2005, 07:57 PM
Cecil14's Avatar
Cecil14 Cecil14 is offline
 
Join Date: Jan 22, 2001
Location: Carson City, NV
Posts: 5,094
Post

You've got a ground or a short problem (or one causing the other). I'd start with the engine ground and work your way down the line. Check the grounds for the lights as well of course, it's possible that the wiring to the lights rubbed and it grounding now. If your wire loom is rotted away (as most of ours probably is now...) now's a good time to replace it.

aa
__________________
1983 J-10 - 4.6L(MPFI)/CS130D/Hydroboost/NV3550/D300/44/44/3.54/Disc-Disc/32s/42 gallon 'burb tank
Reply With Quote
  #4  
Old 12-29-2005, 01:25 AM
shimniok's Avatar
shimniok shimniok is offline
FSJ Maniac
 
Join Date: Jan 08, 2003
Location: Centennial, Colorado
Posts: 2,907
Post

Among other things, check the alternator's voltage regulator output voltage? That could potentially explain the battery dying as well as what sounds like a sudden overvoltage on the lights... but it could be other things too as mentioned.
__________________
Broken Photobucket image in my post? PM me.
1986 Grand Wagoneer "Troubled Child"tc.wagoneer.orgFacebook • KØFSJ
Stock 360, TBI, 727 with TransGo, NP208, 4" Skyjacker, 33" BFG MT, WT Axles, Lock Right & ARB, OBA
Reply With Quote
  #5  
Old 12-29-2005, 12:58 PM
Faktory_Flaws's Avatar
Faktory_Flaws Faktory_Flaws is offline
Banned
 
Join Date: May 02, 2005
Location: Portland Oregon
Posts: 265
Post

The voltage is as little as 7 or so volts and as high as 15. All of the grounds from the battery and engine are secure.
Reply With Quote
  #6  
Old 01-01-2006, 05:58 PM
shimniok's Avatar
shimniok shimniok is offline
FSJ Maniac
 
Join Date: Jan 08, 2003
Location: Centennial, Colorado
Posts: 2,907
Post

If it ranges from 7-15 then your regulator is almost certainly toast. I think you can get those separately from auto parts stores, and then swap in. Cheaper I would think than a whole new alternator. I've never done it tho (yet). You can get rebuild kits for alternators, maybe they include regulators.
__________________
Broken Photobucket image in my post? PM me.
1986 Grand Wagoneer "Troubled Child"tc.wagoneer.orgFacebook • KØFSJ
Stock 360, TBI, 727 with TransGo, NP208, 4" Skyjacker, 33" BFG MT, WT Axles, Lock Right & ARB, OBA
Reply With Quote
  #7  
Old 01-01-2006, 06:30 PM
illegalFSJ illegalFSJ is offline
Bleedin' Gasoline
 
Join Date: Jun 03, 2002
Location: Bend, OR
Posts: 2,143
Post

My money is on a faulty voltage regulator. Good to see another Oregonian on the board!
__________________
"Well, what gears do you have? If you have 2.72s in there still, a blown big block with jesus himself working the gas pedal couldnt get the rear tires to slip." -Mavawreck

1977 J10, shortbed, 360, T18a 4-speed, D20, 32\" A/T tires, Warn hubs - Forest Service Green
Reply With Quote
  #8  
Old 01-02-2006, 02:27 AM
jeepguzzi jeepguzzi is offline
AMC 4 OH! 1
 
Join Date: Oct 21, 2000
Location: bensenville, illinois, usa
Posts: 4,018
Post

Also check the lead to the alternator. My connector was causing overcharging and blown headlights.
__________________
79Cherokee Chief<br />4\" BDS Lift<br />Custom Bumper <br />33\"x 11.5\" x 15\" BFG All-Terrains"<br /> T.H. 400 B.W.1339 Quadra Trac <br />Mile marker 16% O.D.part time kit<br />360c.i. Edelbrock pkg.<br />MSD ign. & coil <br/>Bored .030 over<br />Tri-Y headers<br />stainless steel exhaust<br />mustang seats<br />Holley 4bbl
Reply With Quote
  #9  
Old 01-02-2006, 08:47 AM
andy d andy d is offline
Shade Tree Shaman
 
Join Date: May 06, 2000
Location: Marshfield,MA
Posts: 7,205
Cool

sounds like a sick voltage regulator to me. If you have a small set of wrenches, for some reason ,IIRC, sockets wont work, swapping out the Delco regulator isnt rocket surgery. Last 1 I bought was less than 6 $ and took me about 1/2 hr to replace. Hint make a few reference marks across the case 1/2s so you re-clock it right.

[ January 02, 2006, 02:49 PM: Message edited by: andy d ]
__________________
\'88 gwag,pure stock
Reply With Quote
  #10  
Old 01-02-2006, 08:50 AM
Ultimate J10's Avatar
Ultimate J10 Ultimate J10 is offline
Member
 
Join Date: Nov 06, 2005
Location: Canby, Oregon
Posts: 131
Post

Quote:
Originally posted by illegalFSJ:
Good to see another Oregonian on the board!
Sure is
__________________
1977 Jeep J10 SB - For Sale
Gladiator/Rhino Front End
AMC 360 4V/T18 to D20
D44 Front & Rear

Fun To &
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 04:08 AM.


Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
corner corner