Notices
1999 - 2016 Super Duty 1999 to 2016 Ford F250, F350, F450 and F550 Super Duty with diesel V8 and gas V8 and V10 engines
Sponsored by:
Sponsored by: Real Truck

Strange Lighting Problem

Thread Tools
 
Search this Thread
 
Old Feb 15, 2010 | 06:14 PM
  #1  
pkgtkel's Avatar
pkgtkel
Thread Starter
|
New User
Joined: Feb 2010
Posts: 2
Likes: 0
Strange Lighting Problem

I was driving my 1999 Powerstroke today and thought that my turn signal relay went bad. Picked up a new relay and went home and swapped it out. Following the relay swap, discovered that the flashers worked fine with the headlights off and no break pedal applied, but as soon as I turn on the headlights and hit the brakes, the flashers stopped working and the indicator signal in the cab went very dim. Also, I have absolutely no reverse lights (headlights off or on). When I have my headlights turned off in the cab, the brake lights would work, but with the headlights on, the brake lights didn't work. I found some corrosion on my trailer plug, cleaned the contacts--did not help. Looked at the wiring under the dash, but nothing stood out as obviously bad. Inspected all fuses--no issues there. Unfortunately, rain and darkness stopped my troubleshooting, so had to retire to the geek machine here to look for assistance. If you've got any ideas, let me know.
 
Reply
Old Feb 20, 2010 | 03:22 PM
  #2  
pkgtkel's Avatar
pkgtkel
Thread Starter
|
New User
Joined: Feb 2010
Posts: 2
Likes: 0
Fixed it--found a short in the tail light harness.
 
Reply
Old Feb 20, 2010 | 03:43 PM
  #3  
Headviking's Avatar
Headviking
Laughing Gas
Joined: May 2006
Posts: 1,192
Likes: 0
From: Oakville, Ontario
Club FTE Silver Member

Now how did you find it?
 
Reply
Old Feb 20, 2010 | 09:30 PM
  #4  
_Rick_'s Avatar
_Rick_
Elder User
Joined: Dec 2007
Posts: 784
Likes: 1
From: White Rock BC Canaduh
Hi pkgtel,

Welcome to FTE,

Sorry your post went un-replied to. Hope you don't feel ignored.

Glad you got it sorted though.

Was it just luck you found the short in the tail light harness or did some thing lead you to it?

Rick..

Originally Posted by pkgtkel
I was driving my 1999 Powerstroke today and thought that my turn signal relay went bad. Picked up a new relay and went home and swapped it out. Following the relay swap, discovered that the flashers worked fine with the headlights off and no break pedal applied, but as soon as I turn on the headlights and hit the brakes, the flashers stopped working and the indicator signal in the cab went very dim. Also, I have absolutely no reverse lights (headlights off or on). When I have my headlights turned off in the cab, the brake lights would work, but with the headlights on, the brake lights didn't work. I found some corrosion on my trailer plug, cleaned the contacts--did not help. Looked at the wiring under the dash, but nothing stood out as obviously bad. Inspected all fuses--no issues there. Unfortunately, rain and darkness stopped my troubleshooting, so had to retire to the geek machine here to look for assistance. If you've got any ideas, let me know.
 
Reply




All times are GMT -5. The time now is 08:25 PM.

story-0
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-1
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-2
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-3
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-4
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
story-5
Top 10 Ford Trucks Coming to Mecum Indy 2026

Slideshow: Here are the top 10 Fords coming to Mecum Indy 2026.

By Brett Foote | 2026-05-04 13:49:49


VIEW MORE
story-6
5 Best / 5 Worst Ford Truck Wheels of All Time

Slideshow: The 5 best and 5 worst Ford truck wheels of all time

By Joe Kucinski | 2026-04-29 16:49:01


VIEW MORE
story-7
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!

Slideshow: Ranking the 5 things owners love about their Super Duty and 5 things they don't

By Joe Kucinski | 2026-04-29 16:36:49


VIEW MORE
story-8
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!

Slideshow: Ranking all 12 Ford truck engines available in 2026.

By Michael S. Palmer | 2026-04-22 13:32:20


VIEW MORE
story-9
The Best F-150 Deal of Every Trim Level (XL through Raptor)

Slideshow: The best Ford F-150 deal for every trim level (XL through Raptor)

By Joe Kucinski | 2026-04-21 15:59:01


VIEW MORE