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

no brake lights

Thread Tools
 
Search this Thread
 
Old Mar 31, 2013 | 12:22 PM
  #16  
wyckedcombo17's Avatar
wyckedcombo17
Posting Guru
Joined: Sep 2009
Posts: 1,159
Likes: 1
From: Suburbs of Chicago
Alrighty, good that you have 12v at RED/BLK when pedal is pressed.

Do you have the column apart enough that you can backprobe the TSS? (EDIT: turn signal switch, sorry I work with a lot of Fords at my shop and they have a ton of acronyms)?

If so, put a your red lead at the RED/BLK right at the TSS, and your black at shiny metal with brake pedal depressed. Then do it at WHT/RED right at the TSS wit the hazards on. You can unplug the harness too and do it from the front side, but DO NOT damage the pins. Lightly touch them. Do you have 12v at that location?

If you do, there's just 1 or 2 tests left to tell me what exactly it is.

Do your front blinkers work when you have the hazards on?
 
Reply
Old Mar 31, 2013 | 12:38 PM
  #17  
Rob Cuenin's Avatar
Rob Cuenin
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 438
Likes: 0
From: Palm Bay,Florida
I have 12 v at both red/black and white/red. YEH
When I turn on hazzards, no front lights flash.
When the front blinker is on and I turn on the hazzards the blinker stops working.

EDIT I just recheched red/black NO power
EDIT EDIT I have power at red/black with pedal pressed
 
Reply
Old Mar 31, 2013 | 12:56 PM
  #18  
wyckedcombo17's Avatar
wyckedcombo17
Posting Guru
Joined: Sep 2009
Posts: 1,159
Likes: 1
From: Suburbs of Chicago
With harness connected, red lead at GRN or YEL/BLK and black lead at shiny metal, you have 0v, correct?
 
Reply
Old Mar 31, 2013 | 01:07 PM
  #19  
Rob Cuenin's Avatar
Rob Cuenin
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 438
Likes: 0
From: Palm Bay,Florida
I have 12v power at lime fat green wire with pedal pressed but that is with green wire disconnected at right rear ! if I connect right rear green wire than no power at green wire at steering column

If I take out right rear bulb I got power to socket
NO power to green wire at column.

Sorry for all the confusion!
 
Reply
Old Mar 31, 2013 | 02:08 PM
  #20  
wyckedcombo17's Avatar
wyckedcombo17
Posting Guru
Joined: Sep 2009
Posts: 1,159
Likes: 1
From: Suburbs of Chicago
But no power at YEL/BLK?
 
Reply
Old Mar 31, 2013 | 02:19 PM
  #21  
redroad's Avatar
redroad
Lead Driver
15 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2006
Posts: 5,217
Likes: 506
From: Pa.
Club FTE Gold Member
Do you have a good chasis ground for rear harness ?
 
Reply
Old Mar 31, 2013 | 02:25 PM
  #22  
Rob Cuenin's Avatar
Rob Cuenin
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 438
Likes: 0
From: Palm Bay,Florida
No power at skinny yellow with black stripe leading into steering column.

I have good ground,turn signals work good.
 
Reply
Old Mar 31, 2013 | 02:39 PM
  #23  
Rob Cuenin's Avatar
Rob Cuenin
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 438
Likes: 0
From: Palm Bay,Florida
Sorry, sorry Please go back to link #10
I have power into switch through red wire but no power out of switch (red/black) wire with pedal pushed
EDIT
I had all the wires to the back sockets unplugged when testing the first time.
If I take out right rear bulb I have power to boo switch in and out.
 
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 Mar 31, 2013 | 02:56 PM
  #24  
redroad's Avatar
redroad
Lead Driver
15 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2006
Posts: 5,217
Likes: 506
From: Pa.
Club FTE Gold Member
putting this up so we have something to refer to .. notice turn signal and emergency flasher switch top left
 
Reply
Old Mar 31, 2013 | 03:02 PM
  #25  
Rob Cuenin's Avatar
Rob Cuenin
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 438
Likes: 0
From: Palm Bay,Florida
Thanks for the pic but I CAN'T make heads or tails of any of that! I'm a house painter by trade,20 years LOL
 
Reply
Old Mar 31, 2013 | 03:05 PM
  #26  
redroad's Avatar
redroad
Lead Driver
15 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2006
Posts: 5,217
Likes: 506
From: Pa.
Club FTE Gold Member
this is a 79 diagram for the F100
 
Reply
Old Mar 31, 2013 | 03:16 PM
  #27  
redroad's Avatar
redroad
Lead Driver
15 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2006
Posts: 5,217
Likes: 506
From: Pa.
Club FTE Gold Member
looking at the last diagram the RED / WHT wire feeds the brake switch from the 20A fuse and it also feeds the hazard flasher.. Fuse block --> right bank lowest down
check
 
Reply
Old Mar 31, 2013 | 03:25 PM
  #28  
wyckedcombo17's Avatar
wyckedcombo17
Posting Guru
Joined: Sep 2009
Posts: 1,159
Likes: 1
From: Suburbs of Chicago
Wait, what?

I'm confused about what you did unplugging the sockets. To me it sounds like when you unplug your right socket then the BOO switch doesn't work???? Is that what you're saying?

Plug everything back in, and then try the BOO switch again like in post #10.
 
Reply
Old Mar 31, 2013 | 03:26 PM
  #29  
Rob Cuenin's Avatar
Rob Cuenin
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 438
Likes: 0
From: Palm Bay,Florida
My brake light switch has a red and red/black wires to it, then red/black into steering column.
 
Reply
Old Mar 31, 2013 | 03:29 PM
  #30  
Rob Cuenin's Avatar
Rob Cuenin
Thread Starter
|
Senior User
Joined: Dec 2004
Posts: 438
Likes: 0
From: Palm Bay,Florida
When everything is plugged in , the boo switch has no power coming out.
 
Reply



All times are GMT -5. The time now is 07:48 PM.

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