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

99 F550 Flashers don't work

Thread Tools
 
Search this Thread
 
Old Feb 20, 2014 | 02:37 PM
  #1  
Cole Neese's Avatar
Cole Neese
Thread Starter
|
Senior User
Joined: Jul 2012
Posts: 295
Likes: 1
From: Centerpoint, IN
Exclamation 99 F550 Flashers don't work

My dad has a 99 F550 with a 7.3 and the flashers won't work. The turn signals work just fine(normal speed) but the flashers don't do anything. I changed the flasher relay and that didn't do anything. I found the fuse for it in the passenger compartment fuse box (fuse #1) and it was fine. What stumped me is that the fuse only gets 0.49V according to my multimeter, maybe a bad connection but I got the same result 5 times, on the "2V" scale. When I put the fuse back in the relay goes through one cycle and then stops, so instead of going click-Click-click-Click-etc it goes click-Click-nothing. Any ideas what this may be? I'm not exactly good with the electronics on newer vehicles so I'm stumped. Thanks for any help.
 
Reply
Old Feb 20, 2014 | 10:31 PM
  #2  
Cole Neese's Avatar
Cole Neese
Thread Starter
|
Senior User
Joined: Jul 2012
Posts: 295
Likes: 1
From: Centerpoint, IN
Please help? I really need to fix this we farm and the flashers get used a lot. They didn't work when we bought the truck so I don't know when or how they went out.
 
Reply
Old Feb 20, 2014 | 11:57 PM
  #3  
Ravenwood Ranch's Avatar
Ravenwood Ranch
Senior User
Joined: Mar 2009
Posts: 366
Likes: 1
From: Hanford, CA
i would pull the relay and check the connections if there clean i would run a meeter through and make sure that it is engaging

Quote from UNBROKEN

t's down low...behind/below the radio in the center of the dash.
Reach up towards the radio from the gas pedal area. The easiest way to find it is to turn on the blinkers and feel for the relay that's clicking.
 
Reply
Old Feb 21, 2014 | 07:56 AM
  #4  
Cole Neese's Avatar
Cole Neese
Thread Starter
|
Senior User
Joined: Jul 2012
Posts: 295
Likes: 1
From: Centerpoint, IN
Originally Posted by Ravenwood Ranch
i would pull the relay and check the connections if there clean i would run a meeter through and make sure that it is engaging

Quote from UNBROKEN

t's down low...behind/below the radio in the center of the dash.
Reach up towards the radio from the gas pedal area. The easiest way to find it is to turn on the blinkers and feel for the relay that's clicking.
I did, I pulled it and the connections were clean so I replaced it and that didn't do anything. What should the meter say on the different connections for the relay with the flasher on? I wondered about checking it but not knowing which circuit is which I figured it wouldn't help much. I kind of wondered if it could be the switch in the steering column?
 
Reply
Old Feb 22, 2014 | 06:27 PM
  #5  
Cole Neese's Avatar
Cole Neese
Thread Starter
|
Senior User
Joined: Jul 2012
Posts: 295
Likes: 1
From: Centerpoint, IN
Help please?
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Sberry27
Electrical Systems/Wiring
5
Oct 16, 2014 07:32 AM
73f100shortbed
Bronco II
3
Jul 18, 2006 06:50 PM
Tony711
1997 - 2006 Expedition & Navigator
4
Jun 23, 2003 10:37 PM




All times are GMT -5. The time now is 10:18 AM.

story-0
10 Ways Ford is LOSING to the Competition

Slideshow: 10 ways Ford is losing to the competition

By Joe Kucinski | 2026-06-15 09:52:01


VIEW MORE
story-1
Top 6 Best Deals Available on New Fords & Lincolns Right Now

Some great targets in today's expensive world.

By Brett Foote | 2026-06-15 09:35:19


VIEW MORE
story-2
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-3
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-4
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-5
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-6
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-7
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-8
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-9
Rezvani's Latest Post-Apocalyptic 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 | 2026-06-03 11:38:36


VIEW MORE