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

Brake Light on

Thread Tools
 
Search this Thread
 
Old Jul 19, 2007 | 06:54 PM
  #1  
rmalottwtes30's Avatar
rmalottwtes30
Thread Starter
|
Posting Guru
Joined: Jun 2004
Posts: 1,808
Likes: 0
From: Cincinnati Ohio
Brake Light on

Back a while ago i got a brake booster and the pedel out of a truck to put in my 76 since it had manual brakes, now the brake light is on...it was never hooked up until now and apparently something is wrong. Also I noticed today when it is idleing and you go pump the brakes it idles the truck up is that suppost to do that or not? and what should I start out at with the brake problem? Would it be better to have the manual brakes or the power ones?
 
Reply
Old Jul 19, 2007 | 08:25 PM
  #2  
rusty7983's Avatar
rusty7983
Laughing Gas
Joined: Feb 2007
Posts: 821
Likes: 0
From: hohenwald, tn
power brakes are better. if the pedal is low, the motion of you pushing the pedal down fills the booster with vaccuum from the engine and it idles up (up i think).
 
Reply
Old Jul 19, 2007 | 09:04 PM
  #3  
rmalottwtes30's Avatar
rmalottwtes30
Thread Starter
|
Posting Guru
Joined: Jun 2004
Posts: 1,808
Likes: 0
From: Cincinnati Ohio
ya and when i push it down u gotta use ur hand to bring it back up cuz it dont come up all the way.
 
Reply
Old Jul 19, 2007 | 09:11 PM
  #4  
Mil1ion's Avatar
Mil1ion
New User
Joined: Jan 2008
Posts: 0
Likes: 24
The problem is probably the Master cylinder.

The brake system requires a hydraulic pressure push back of parts.

Things necessary to accomplish this are:
Non-interior rusted Master cylinder
Non-seizing calipers
Non-seizing wheel cylinders
Good brake shoe return springs
non-seizing working proportioning valve


Brake fluid absorbs water and gets worse the older it is.

I think you need to inspect all brake parts and flush the fluid.
 
Reply
Old Jul 19, 2007 | 09:21 PM
  #5  
rmalottwtes30's Avatar
rmalottwtes30
Thread Starter
|
Posting Guru
Joined: Jun 2004
Posts: 1,808
Likes: 0
From: Cincinnati Ohio
ok so tomorrow I will go out and bleed out the system and check out all the cylinders. the cylinders and brake line have been all been replaced a while back. the master cylinder i presume is origional. the truck has been sitting for a few months with little movement. Could it possibly be the booster? did I get the wrong one for my truck? I did no modifications to install it except have to use the brake pedel that came with the booster since it dont come up the same height as the manual pedel did.
 
Reply
Old Jul 19, 2007 | 09:30 PM
  #6  
Mil1ion's Avatar
Mil1ion
New User
Joined: Jan 2008
Posts: 0
Likes: 24
What is the FT-number stamped on the push rod ?
 
Reply
Old Jul 19, 2007 | 09:55 PM
  #7  
rmalottwtes30's Avatar
rmalottwtes30
Thread Starter
|
Posting Guru
Joined: Jun 2004
Posts: 1,808
Likes: 0
From: Cincinnati Ohio
I have to take the booster out to do that wont I?
 
Reply
Old Jul 19, 2007 | 10:35 PM
  #8  
Mil1ion's Avatar
Mil1ion
New User
Joined: Jan 2008
Posts: 0
Likes: 24
No just undo the pedal bolt and look at the side of the push rod.
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-1

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

 Brett Foote
story-2

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

 Michael S. Palmer
story-3

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

 Verdad Gallardo
story-4

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-5

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

 Brett Foote
story-6

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

 Michael S. Palmer
story-7

10 Most Surprising 2026 Ford Truck Features!

 Joe Kucinski
story-8

Top 10 Ford Trucks Coming to Mecum Indy 2026

 Brett Foote
story-9

5 Best / 5 Worst Ford Truck Wheels of All Time

 Joe Kucinski
Old Jul 20, 2007 | 05:27 PM
  #9  
rmalottwtes30's Avatar
rmalottwtes30
Thread Starter
|
Posting Guru
Joined: Jun 2004
Posts: 1,808
Likes: 0
From: Cincinnati Ohio
the only number i found on the push rod is 23. is that the number i need to find?
 
Reply
Old Jul 20, 2007 | 08:59 PM
  #10  
Mil1ion's Avatar
Mil1ion
New User
Joined: Jan 2008
Posts: 0
Likes: 24
You need Brake Booster FT-17.

http://www.precisionrebuilders.com/p...ogPHB-0398.pdf
 
Reply
Old Jul 21, 2007 | 05:48 PM
  #11  
rusty7983's Avatar
rusty7983
Laughing Gas
Joined: Feb 2007
Posts: 821
Likes: 0
From: hohenwald, tn
i had a bad master that leaked into and filled a booster. when i drained it there was about 6 oz of brake fluid. the pedal did like you said, pushed down and stayed to the floor.
 
Reply
Old Jul 21, 2007 | 06:03 PM
  #12  
NumberDummy's Avatar
NumberDummy
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 784
From: Simi Valley, CA
Club FTE Gold Member
Originally Posted by rmalottwtes30
Back a while ago i got a brake booster and the pedel out of a truck to put in my 76 since it had manual brakes, now the brake light is on...it was never hooked up until now and apparently something is wrong.
Which brake light...the stoplights, or the low brake fluid warning light on the dash? If it's the dash light, that is controlled by the low brake fluid warning light switch that screws into the brake proportioning valve.


The switch is plastic, and over time develops minute cracks in the threads. When that occurs, just enough brake fluid seeps by the switch to activate it. Then the light on the dash comes on...and stays on.
 

Last edited by NumberDummy; Jul 21, 2007 at 06:06 PM.
Reply
Old Sep 23, 2007 | 01:09 AM
  #13  
rmalottwtes30's Avatar
rmalottwtes30
Thread Starter
|
Posting Guru
Joined: Jun 2004
Posts: 1,808
Likes: 0
From: Cincinnati Ohio
Ok I went out to Advance auto the other day and ordered a new master cylinder and brake booster for a f100 and when they got it...it was the same as the old one that was on my truck.. Like Dennis said I need the push rod 13 and its 23 but the thing is the master cylinder didn't come with the mounting bracket all it came with was the booster itself...What do I do?
 
Reply




All times are GMT -5. The time now is 10:56 AM.

story-0
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

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


VIEW MORE
story-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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