Problem with lights blinking off and on...
Junior User
Joined: Jun 2001
Posts: 50
Likes: 0
Problem with lights blinking off and on...
on my 1979 F150. I have checked all the fuses, all are good. I have taken out both headlights and cleaned the corrosion off the plug-ins. Still my damn lights blink off and on. Anyone have any idea what the problem could be?
Posting Guru
Joined: Dec 2000
Posts: 1,686
Likes: 1
From: Racine WI
Problem with lights blinking off and on...
The headlight switch has an integral circuit breaker I believe it sounds like you have a short and its tripping the breaker then when the breaker resets and realizes the short is still there it trips again, look for a short somewhere
Cargo Master
Joined: Jul 1999
Posts: 2,484
Likes: 7
From: New Egypt, New Jersey
Problem with lights blinking off and on...
Hi, A bad dimmer (high beam) switch can also make your lights blink on and off. Mine went bad and did the same thing. It's kind of embarrasing when people think you are doing it intentionally, and they pull over for you to pass them.
Kenny
Kenny
Senior User
Joined: Aug 1999
Posts: 166
Likes: 0
Problem with lights blinking off and on...
Yakima, you might also check the voltage regulator. I had one that was bad, and sending too much voltage to the system (headlights included) It would cause the switch to overheat and the lights would flicker. Eventually cost me a battery, voltage regulator, and a couple of headlights. Just my experience.
1977 F-100
300 I-6 / C-4 (soon to be AOD)
Offy C intake w/Edelbrock 500CFM
Hooker Ceramic coated headers w/duals, turbos, tips, and 02's(for tuning)
MSD6A w/Blaster Coil
Headlight relay system (Delanty style)
Overhead Mount FM-CD etc.
R-134 A/C system (I'm cool)
1977 F-100
300 I-6 / C-4 (soon to be AOD)
Offy C intake w/Edelbrock 500CFM
Hooker Ceramic coated headers w/duals, turbos, tips, and 02's(for tuning)
MSD6A w/Blaster Coil
Headlight relay system (Delanty style)
Overhead Mount FM-CD etc.
R-134 A/C system (I'm cool)
Trending Topics
New User
Joined: Oct 2001
Posts: 7
Likes: 0
Problem with lights blinking off and on...
Yakima,
For a better cure click on the "Tech Arctiles" on the right side of this page, scroll down to "Whiter whites, Brighter brightes"
DSD
69F350
390_4sp
For a better cure click on the "Tech Arctiles" on the right side of this page, scroll down to "Whiter whites, Brighter brightes"
DSD
69F350
390_4sp
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Junior User
Joined: Jun 2001
Posts: 50
Likes: 0
Problem with lights blinking off and on...
Hadn't had time today to take off switch, but I just drove the truck a few miles without lights flickering. It's only doing it when something gets hot. Plan on taking off the headlight switch tomorrow to see if anything's corroded or not. The dimmer switch was replaced last month.