Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
Sign in using an external account
Register Forgot Password?


1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 05-08-2011, 04:19 PM
80' ford man55 80' ford man55 is offline
Freshman User
 
Join Date: Mar 2011
Posts: 25
80' ford man55 is starting off with a positive reputation.
dash brake light always on

hi guys,

Before i took my truck, an 80' f100 with a 302, off the road last fall the brake light in the dash came on. I thought it was because the brakes were terrible. My fronts looked decent, and i changed the backs. My brakes are now great, but the dash brake light is still on.

Anyone come across the same problem or have suggestions? Thanks!
Reply With Quote
  #2 (permalink)  
Old 05-08-2011, 04:39 PM
84-6.9L's Avatar
84-6.9L 84-6.9L is offline
Posting Guru
 
Join Date: Feb 2011
Location: Princeton MN
Posts: 2,212
84-6.9L is gaining momentum as a positive member of FTE.84-6.9L is gaining momentum as a positive member of FTE.
It might be the proportioning valve. The haynes manual tells you how to reset it if you have one
__________________
Keep our planet clean, when you fuel up please use the green handle.
84 F-250 6.9 with a boost from Hypermax.
87 F-150 5.0 The winter truck
68 F-250 CamperSpecial 390ci/NP435 Getting a Diesel!
75 9600 Tractor 401ci Blowin smoke in 300 ft bursts
Tom
Reply With Quote
  #3 (permalink)  
Old 05-08-2011, 06:02 PM
81-F-150-Explorer 81-F-150-Explorer is offline
Post Fiend
 
Join Date: Jul 2004
Location: Northern California
Posts: 8,791
81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold
I agree, porportioning valve could be stuck. Try resetting it, and also bleed the brakes if air could have gotten into the system with the brake repair.

The 1984 year model is the first year that the brake warning light was hooked to the parking brake pedal as standard, so it's almost positive it's not that problem for your 1980, unless someone added it. There was a dealer kit for this before 1984, so just check the parking brake pedal for added wires etc...
Reply With Quote
  #4 (permalink)  
Old 05-08-2011, 07:53 PM
80' ford man55 80' ford man55 is offline
Freshman User
 
Join Date: Mar 2011
Posts: 25
80' ford man55 is starting off with a positive reputation.
I have the manual, i'll have to check it out.
Thanks guys.
Reply With Quote
  #5 (permalink)  
Old 05-08-2011, 08:02 PM
joshofalltrades joshofalltrades is offline
Postmaster
 
Join Date: Feb 2011
Posts: 3,499
joshofalltrades is gaining momentum as a positive member of FTE.joshofalltrades is gaining momentum as a positive member of FTE.
some of us (me) have used the "remove light bulb" approach, but its not recomended. the posts above are leading toward the proper fix.
Reply With Quote
  #6 (permalink)  
Old 05-08-2011, 08:06 PM
6fifty_f1fifty's Avatar
6fifty_f1fifty 6fifty_f1fifty is offline
Elder User
 
Join Date: Apr 2009
Location: Whidbey Island, WA
Posts: 909
6fifty_f1fifty is gaining momentum as a positive member of FTE.6fifty_f1fifty is gaining momentum as a positive member of FTE.
The only time mine comes on is when the fluid is low... Edit ***I'm thinking of a Ranger that I used to have.
__________________
Robert
1980 F-150 Custom 4x4, 300/NP435/NP208
1986 E-350 Motorhome, 460/C6

Last edited by 6fifty_f1fifty; 05-08-2011 at 08:07 PM. Reason: Remembering apparatus re-calibrated.
Reply With Quote
  #7 (permalink)  
Old 05-08-2011, 08:10 PM
Franklin2's Avatar
Franklin2 Franklin2 is offline
Moderator
 
Join Date: Jan 2001
Location: Staunton VA
Posts: 32,180
Franklin2 has much to be proud ofFranklin2 has much to be proud ofFranklin2 has much to be proud ofFranklin2 has much to be proud ofFranklin2 has much to be proud ofFranklin2 has much to be proud ofFranklin2 has much to be proud ofFranklin2 has much to be proud ofFranklin2 has much to be proud ofFranklin2 has much to be proud of
If you want to make sure it is the proportioning valve causing the problem, just disconnect the wire going to the valve. If the light goes out, then that is the problem. It has a plunger that separates the front brake system from the rear. If you have a failure in either system, the pressure difference pushes the plunger off center and grounds the wire which lights the dash light.
__________________
Dave F

1989 F250 XLT Diesel
Reply With Quote
  #8 (permalink)  
Old 05-08-2011, 08:26 PM
80' ford man55 80' ford man55 is offline
Freshman User
 
Join Date: Mar 2011
Posts: 25
80' ford man55 is starting off with a positive reputation.
Quote:
Originally Posted by joshofalltrades View Post
some of us (me) have used the "remove light bulb" approach, but its not recomended. the posts above are leading toward the proper fix.
yeah i thought about it, but i wanted to see how easy the fix would be first. lol
Reply With Quote
  #9 (permalink)  
Old 05-09-2011, 02:33 PM
81-F-150-Explorer 81-F-150-Explorer is offline
Post Fiend
 
Join Date: Jul 2004
Location: Northern California
Posts: 8,791
81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold81-F-150-Explorer is a splendid one to behold
The light is a safety feature. Disconnecting it or making it inoperable is not a wise idea.

There are also insurance repercussions to concider if you get in an accident. Your insurance does not have to pay, and you could be liable for any accident you are in, your fault, or their fault, for tampering with safety equipment.
Reply With Quote
  #10 (permalink)  
Old 05-09-2011, 03:14 PM
80' ford man55 80' ford man55 is offline
Freshman User
 
Join Date: Mar 2011
Posts: 25
80' ford man55 is starting off with a positive reputation.
valid point, fix looks easy enough
Reply With Quote
  #11 (permalink)  
Old 05-09-2011, 09:38 PM
ford-lover1995's Avatar
ford-lover1995 ford-lover1995 is offline
Senior User
 
Join Date: Jan 2011
Location: RED ROCK TEXAS
Posts: 128
ford-lover1995 is starting off with a positive reputation.
sheets.dalton@yahoo.com
i just smacked the bulb with a screw driver untill i get around to fixing it lol
Reply With Quote
Old 05-09-2011, 09:38 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Older, Classic & Antique Trucks > 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks

Tags
1980, 2007, 250, 82, 86, brake, dash, diesel, econoline, f250, ford, light, reset, suck, truck, warning

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 09:25 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup