Notices
1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
Sponsored by:
Sponsored by: Moser

Headlights Flickering

Thread Tools
 
Search this Thread
 
Old Apr 16, 2006 | 10:21 PM
  #1  
4x4bigblock's Avatar
4x4bigblock
Thread Starter
|
Mountain Pass
Joined: Feb 2006
Posts: 174
Likes: 1
Headlights Flickering

My headlights flicker after running it for a while. usually when on high. Could it be my floor switch? i had a bad voltage regulator but its new now.
 

Last edited by 4x4bigblock; Apr 16, 2006 at 10:23 PM.
Reply
Old Apr 16, 2006 | 10:26 PM
  #2  
Torque1st's Avatar
Torque1st
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
4 places to look are the usual culprits:

Bad headlight switch or connector.

Bad floor switch or connector.

Bad headlight connectors.

Bad grounds.
 
Reply
Old Apr 16, 2006 | 10:35 PM
  #3  
FordBoypete's Avatar
FordBoypete
Posting Guru
Joined: Jul 2003
Posts: 2,222
Likes: 1
From: East Central Florida
Bad Block to body, or block to nose sheetmetal [front clip] grounding cables too.

FBp
 
Reply
Old Apr 17, 2006 | 12:36 AM
  #4  
Mil1ion's Avatar
Mil1ion
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Ford headlight systems circuitry suck big time.

They involve a circuit breaker in the switch because full power runs through it.

I suggest to do the relay upgrade to solve this problem forever.

https://www.ford-trucks.com/article/...r_Brights.html
https://www.ford-trucks.com/article/...ay_System.html
 
Reply
Old Apr 17, 2006 | 08:12 PM
  #5  
jimlj's Avatar
jimlj
Posting Guru
Joined: Jun 2002
Posts: 1,203
Likes: 2
From: where the deer and antelo
I second what Mil1ion said. Best $35 (including the new headlights) I ever spent on my truck.
 
Reply
Old Apr 18, 2006 | 09:46 AM
  #6  
partsman01's Avatar
partsman01
Senior User
Joined: Apr 2005
Posts: 213
Likes: 1
From: Port Coquitlam, BC Canada
I noticed a pulsatinn of my lights on my 79 truck, it stopped as soon as I held and pushed on the plug going to my voltage regulator, and gave it a good wiggle.
 
Reply
Old Apr 18, 2006 | 10:49 AM
  #7  
Mil1ion's Avatar
Mil1ion
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Yes, Grounding of electrical components is most important.

Good idea to coat the contact with d-electric grease as well.

The Headlight flicker in Fords is a well known problem though.... because of the amount of current going through the switch.

GM's don't have this problem because they use the relay system.
But then again, Gm's also have major Grounding problems on their trucks.
 
Reply
Old Apr 19, 2006 | 07:07 AM
  #8  
4x4bigblock's Avatar
4x4bigblock
Thread Starter
|
Mountain Pass
Joined: Feb 2006
Posts: 174
Likes: 1
what is the name of the switch, when ordering at the parts store. or do i just by passs it. i have not had time to read the links there yet . i will tonight. i want to put in silver stars also.
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

 Joe Kucinski
story-1

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

 Brett Foote
story-2

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-3

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-4

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-5

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-6

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-7

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
story-8

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

 Michael S. Palmer
story-9

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
Old Apr 19, 2006 | 10:12 AM
  #9  
Mil1ion's Avatar
Mil1ion
New User
Joined: Jan 2008
Posts: 0
Likes: 24
You need to read the articles.

The swap take a few hours to do.

People should also pay the extra money and buy the Bosch Relays.
 
Reply




All times are GMT -5. The time now is 05:33 AM.

story-0
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-1
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-2
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-3
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-4
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-5
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-6
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-7
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-8
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE
story-9
10 Most Surprising 2026 Ford Truck Features!

Slideshow: 10 most surprising Ford truck options/features in 2026.

By Joe Kucinski | 2026-05-05 11:17:22


VIEW MORE