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 Discussion

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 04-23-2015, 02:29 PM
Red's FSJ's Avatar
Red's FSJ Red's FSJ is offline
Member
 
Join Date: Mar 14, 2002
Location: CT
Posts: 132
Flickering headlights

Hello, hoping someone can lead me in the right direction with my 76 Wagoneer, 401.

The headlights/all lights were flickering so I went ahead and swapped out the headlight switch. The problem persists. It seems to be more intermittent now though but still does it most of the time. What else can I look into to fix this issue?

Thanks!
__________________
1976 Jeep Wagoneer, 401, 5" lift, 33s, Edelbrock Carb & Manifold
2014 Jeep Grand Cherokee SRT

Past Wagoneers:
'77 Wagoneer, 360, bone stock
'88 Grand Wagoneer (4" lift, BF Mud 35", MSD TFI Upgrade, Dual Exhaust w/free flow cat and Flowmaster muffler, SSB all wheel disc brakes)
Reply With Quote
  #2  
Old 04-23-2015, 03:16 PM
Amc71601's Avatar
Amc71601 Amc71601 is offline
Master Mechanic
 
Join Date: Dec 26, 2003
Location: Belleview,Florida
Posts: 764
Sounds like an issue with the ground for the lights. There's a member here in the homegrown vendors section that makes replacement wiring harness for these too.
Reply With Quote
  #3  
Old 04-23-2015, 03:55 PM
serehill's Avatar
serehill serehill is offline
Lone Star
 
Join Date: Nov 22, 2009
Location: Mesquite Texas
Posts: 8,626
yep

Is it just the head light that flicker or all lights that flicker? Although the harness is a great asset I would recommend the dimmer switch be replaced if it is indeed just the headlights. Then install the harness.
__________________

80 Cherokee
360 ci 727 with
Comp cams 270 h
NP208
Edlebrock performer intake
Holley 4180
Msd total multi spark.
4" rusty's springs
Member, FSJ Prissy Restoration Association

If you can't make it better why waste your time. No use repeating the orignal mistakes. I'm to old to push it that's why.
Reply With Quote
  #4  
Old 04-23-2015, 04:20 PM
joe joe is offline
 
Join Date: Apr 28, 2000
Location: PNWet, USA
Posts: 21,690
Lessee you're in CT with that wonderful fun stuff "road salt". The older floor mounted dimmer switches repeatedly getting wet are highly prone to corrosion to going completely south in time. Add the joy of years of salt and the floor dimmer would be my first suspect. Often the ground between the switch and sheet metal floor is all it is but 1976 huh, the entire switch itself is likely toast. The OEM switches were pretty good quality and unfortunately new Taiwan replacements aren't. Since you've got a new headlight switch already, if it's not the dimmer I would chase down and clean the grounds at the lamp end.
__________________
joe
"Don't mind me. I'm just here for the alibi"
Reply With Quote
  #5  
Old 04-23-2015, 04:53 PM
Red's FSJ's Avatar
Red's FSJ Red's FSJ is offline
Member
 
Join Date: Mar 14, 2002
Location: CT
Posts: 132
All lights are flickering. The truck is very clean with very little rust. I will take a look at the dimmer. The interior dome lights do not flicker when the headlights are off, but when they are one, every light flickers, dash, dome, parking light, etc.

Thanks for the responses!
__________________
1976 Jeep Wagoneer, 401, 5" lift, 33s, Edelbrock Carb & Manifold
2014 Jeep Grand Cherokee SRT

Past Wagoneers:
'77 Wagoneer, 360, bone stock
'88 Grand Wagoneer (4" lift, BF Mud 35", MSD TFI Upgrade, Dual Exhaust w/free flow cat and Flowmaster muffler, SSB all wheel disc brakes)
Reply With Quote
  #6  
Old 04-23-2015, 05:12 PM
joe joe is offline
 
Join Date: Apr 28, 2000
Location: PNWet, USA
Posts: 21,690
I'd still bet on the dimmer. If bad it'll affect the dash lights too. Once it gets real bad it'll shut all your lights off. From there while driving down the road you're left with jumping up and down on the switch hoping the headlamps at least come back on. Drove off the road and rolled a VW playing that game.
If it just getting flakey occasionally, while driving down the road and all the lights are behaving tap on the switch with the side of your boot and see if things flicker. It's a cheap enough part to risk your money on.
__________________
joe
"Don't mind me. I'm just here for the alibi"
Reply With Quote
  #7  
Old 04-23-2015, 05:34 PM
serehill's Avatar
serehill serehill is offline
Lone Star
 
Join Date: Nov 22, 2009
Location: Mesquite Texas
Posts: 8,626
OK better input

All the grounds for reach light are independent of each other so if it is a ground which it could be. The issue would be a larger ground like the ground strap that goes from the motor to the body ETC. It won't be the ground going to the light switch it only operates the dome light. It also can be a loose connection on the positive under the dash or fuse block as a last resort.
__________________

80 Cherokee
360 ci 727 with
Comp cams 270 h
NP208
Edlebrock performer intake
Holley 4180
Msd total multi spark.
4" rusty's springs
Member, FSJ Prissy Restoration Association

If you can't make it better why waste your time. No use repeating the orignal mistakes. I'm to old to push it that's why.
Reply With Quote
  #8  
Old 04-23-2015, 08:36 PM
Red's FSJ's Avatar
Red's FSJ Red's FSJ is offline
Member
 
Join Date: Mar 14, 2002
Location: CT
Posts: 132
Thanks to all. I will replace the dimmer and check on the fuse box as well.
__________________
1976 Jeep Wagoneer, 401, 5" lift, 33s, Edelbrock Carb & Manifold
2014 Jeep Grand Cherokee SRT

Past Wagoneers:
'77 Wagoneer, 360, bone stock
'88 Grand Wagoneer (4" lift, BF Mud 35", MSD TFI Upgrade, Dual Exhaust w/free flow cat and Flowmaster muffler, SSB all wheel disc brakes)
Reply With Quote
  #9  
Old 04-24-2015, 06:39 AM
Tornado230's Avatar
Tornado230 Tornado230 is offline
Master Mechanic
 
Join Date: Sep 14, 2008
Location: Fleetwood, PA
Posts: 1,490
Check the grounding of the voltage regulator.
It's grounded through the base, but the ravages of time affect it.
Run a wire from the - post of the battery to the base of the regulator.
See if that makes a difference. It did for me.
Reply With Quote
  #10  
Old 04-24-2015, 09:49 AM
Carnuck's Avatar
Carnuck Carnuck is offline
 
Join Date: Feb 12, 2011
Location: Lynnwood, wa
Posts: 6,286
Right before my ammeter had a total meltdown while driving my lights did the flicker thing.
__________________
Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental.
Reply With Quote
  #11  
Old 09-13-2017, 06:05 PM
AMC-COMMANDO's Avatar
AMC-COMMANDO AMC-COMMANDO is offline
Member
 
Join Date: May 28, 2014
Location: Clovis Ca
Posts: 126
Did you ever solve the problem? I am experiencing the same exciting issue right now. New head light switch and dimmer switch, new ground from battery to the fender. Yet the problem still exists!
Reply With Quote
  #12  
Old 09-13-2017, 09:06 PM
johnsonic johnsonic is offline
Member
 
Join Date: Mar 12, 2015
Location: Oregon
Posts: 73
Since this thread is back from the dead, I had an '87 totally gone through in a bad way by the PO - found that one of the headlight wires was rubbing against the headlight bucket and had worn through the insulation. Just putting it out there as something that happened to me and caused the same issue.
__________________
1984 GW
360
Performer Cam
Performer Intake
Holley SA 670
MSD 8523
Dakota Digital custom cluster
Serehill headlamp harness
NWMP aux tank

1987 GW deceased
...but the parts live on
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ack! No headlights or rad fan!? (rad fan fixed, headlights still fubar) DanHS General FSJ Tech 11 05-07-2008 01:21 PM
No Headlights! MrFurious General FSJ Tech 18 06-17-2006 08:30 PM
Flickering lights?? Allen78J20 General FSJ Tech 10 01-11-2005 01:46 PM
Headlights on = voltage drop 'til battery is near dead....... billyrb General FSJ Tech 6 02-19-2004 11:02 PM
Flickering headlights Breech General FSJ Tech 7 01-06-2002 04:48 AM


All times are GMT -6. The time now is 06:35 AM.


Powered by vBulletin Version 3.5.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
corner corner