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

Dome light sometimes works?

Thread Tools
 
Search this Thread
 
Old Sep 10, 2020 | 07:48 PM
  #1  
huntnfish48's Avatar
huntnfish48
Thread Starter
|
Freshman User
Joined: Mar 2013
Posts: 43
Likes: 1
Dome light sometimes works?

My dome light sometimes comes on when i turn the light switch to the left.
sometimes it takes 5-20 seconds.
sometimes it won't turn on at all.
Same goes for my bed light.

Any idea what could cause this?
 
Reply
Old Sep 10, 2020 | 09:01 PM
  #2  
meangreen92's Avatar
meangreen92
Logistics Pro
20 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2005
Posts: 4,217
Likes: 154
What about the door switches? Do those turn it on immediately?

I'm thinking that it's in the headlight switch, since the headlight switch provides the power for the cargo light. You could remove it and spray it down with contact cleaner, and see if that gets it working again.
The headlight switch sends 12V+ to the cargo light switch via a gray or green(?) wire with a yellow stripe. From the cargo switch, the black wire with the blue stripe runs to the dome light to turn it on, while the black wire with the red stripe runs to the cargo light. Whatever is the remaining wire on the cargo light switch connector is the power feed from the light switch.

 
Reply
Old Sep 10, 2020 | 09:04 PM
  #3  
John89's Avatar
John89
Fleet Mechanic
5 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jul 2017
Posts: 1,448
Likes: 163
From: East Texas
Check the grounds behind the light assemblies. The interior ground is through one of the mounting screws. Not sure about the cargo light. (Don't have one on ours)
 
Reply
Old Sep 11, 2020 | 01:04 AM
  #4  
Christmas's Avatar
Christmas
Logistics Pro
5 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2018
Posts: 3,553
Likes: 442
Clean the bulb socket with a wire brush. That should do it. If not the switch is wore out.
 
Reply
Old Sep 11, 2020 | 08:46 AM
  #5  
Jetfixer-6's Avatar
Jetfixer-6
Laughing Gas
5 Year Member
Liked
Loved
Community Favorite
Joined: Feb 2019
Posts: 805
Likes: 145
From: 59701 West Valley Phoenix
The switch has a copper arm that contacts the coiled spring when you turn the **** to the left. I had intermittent dome/cargo lights and when I took out the switch there was an ever so slight gap between the two but when driving the vibration was just enough to make contact every once in awhile. I bent the contact back into place and it fixed the problem.

 
Reply
Old Sep 13, 2020 | 09:05 PM
  #6  
huntnfish48's Avatar
huntnfish48
Thread Starter
|
Freshman User
Joined: Mar 2013
Posts: 43
Likes: 1
Originally Posted by meangreen92
What about the door switches? Do those turn it on immediately?

I'm thinking that it's in the headlight switch, since the headlight switch provides the power for the cargo light. You could remove it and spray it down with contact cleaner, and see if that gets it working again.
The headlight switch sends 12V+ to the cargo light switch via a gray or green(?) wire with a yellow stripe. From the cargo switch, the black wire with the blue stripe runs to the dome light to turn it on, while the black wire with the red stripe runs to the cargo light. Whatever is the remaining wire on the cargo light switch connector is the power feed from the light switch.
This could be the problem. It makes the most sense with what I've gone through already.
But what is contact cleaner? Brake clean, alcohol, degreaser?
Should I put a smear of dielectric grease on the contact after cleaning?
 
Reply
Old Sep 13, 2020 | 09:18 PM
  #7  
John89's Avatar
John89
Fleet Mechanic
5 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jul 2017
Posts: 1,448
Likes: 163
From: East Texas


 
Reply
Old Sep 19, 2020 | 08:11 PM
  #8  
huntnfish48's Avatar
huntnfish48
Thread Starter
|
Freshman User
Joined: Mar 2013
Posts: 43
Likes: 1
I put in a new led some light bulb and new clear lens. Works perfectly now.
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath

 Verdad Gallardo
story-1

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

 Joe Kucinski
story-2

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

 Brett Foote
story-3

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-4

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

 Brett Foote
story-5

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

 Michael S. Palmer
story-6

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

 Verdad Gallardo
story-7

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-8

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

 Brett Foote
story-9

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

 Michael S. Palmer
Old Sep 19, 2020 | 11:09 PM
  #9  
meangreen92's Avatar
meangreen92
Logistics Pro
20 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2005
Posts: 4,217
Likes: 154
Did you clean or replace the switch?
 
Reply
Old Sep 20, 2020 | 07:12 AM
  #10  
huntnfish48's Avatar
huntnfish48
Thread Starter
|
Freshman User
Joined: Mar 2013
Posts: 43
Likes: 1
Originally Posted by meangreen92
Did you clean or replace the switch?
I did not. I had cleaned the bulb mounting posts only.
 
Reply
Old Sep 20, 2020 | 12:05 PM
  #11  
meangreen92's Avatar
meangreen92
Logistics Pro
20 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2005
Posts: 4,217
Likes: 154
Originally Posted by huntnfish48
I did not. I had cleaned the bulb mounting posts only.
Ah. If the dome light and cargo light were synchronized in their bouts of not working, then the problem is likely still there. But if they malfunctioned independently of each other, then it's fixed.
 
Reply
Old Sep 20, 2020 | 07:09 PM
  #12  
huntnfish48's Avatar
huntnfish48
Thread Starter
|
Freshman User
Joined: Mar 2013
Posts: 43
Likes: 1
Originally Posted by meangreen92
Ah. If the dome light and cargo light were synchronized in their bouts of not working, then the problem is likely still there. But if they malfunctioned independently of each other, then it's fixed.
cargo light still is not working. I took out the cargo switch and cleaned it up with some contact cleaner and reinstalled with dielectric grease.
If I have the dome light on and thenturn on the cargo light the dome light turns off. So I believe the cargo switch is good.
 
Reply
Old Sep 20, 2020 | 08:56 PM
  #13  
meangreen92's Avatar
meangreen92
Logistics Pro
20 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2005
Posts: 4,217
Likes: 154
Originally Posted by huntnfish48
cargo light still is not working. I took out the cargo switch and cleaned it up with some contact cleaner and reinstalled with dielectric grease.
If I have the dome light on and thenturn on the cargo light the dome light turns off. So I believe the cargo switch is good.
Cargo light switch is supposed to turn on the dome light along with the cargo light.
 
Reply
Old Sep 21, 2020 | 10:58 PM
  #14  
broktruk's Avatar
broktruk
Laughing Gas
Veteran: Army
5 Year Member
Liked
Joined: Jan 2018
Posts: 898
Likes: 70
From: Coos Bay
I have the same problem with the dome light. The floor lights are connected to it. My problem, unsure about yours, is fixed When I reach up and touch the harness where it connects in to the switch. My resolve is gonna be to remove switch and inspect the harness. Clean and adjust the individual connectors as they may not be as tight or completely on the flat blades.

give it a try to reach up there while your switch is in the dome position.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
3twinridges
1948 - 1956 F1, F100 & Larger F-Series Trucks
7
Feb 23, 2020 06:29 PM
oem78
1973 - 1979 F-100 & Larger F-Series Trucks
15
Feb 1, 2011 01:38 PM
waldreps
1983 - 2012 Ranger & B-Series
17
Nov 24, 2010 04:58 PM
Bowie
1999 - 2003 7.3L Power Stroke Diesel
5
Jul 1, 2009 05:58 PM




All times are GMT -5. The time now is 03:40 PM.

story-0
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-05-30 18:33:59


VIEW MORE
story-1
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-2
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-3
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

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


VIEW MORE
story-4
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-5
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-6
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-7
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-8
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-9
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