dash brake light always on
Thread Starter
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Freshman User
Joined: Mar 2011
Posts: 31
Likes: 0
From: Lowell
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!
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!
Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
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...
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...
Elder User
Joined: Apr 2009
Posts: 922
Likes: 1
From: San Diego
The only time mine comes on is when the fluid is low... Edit ***I'm thinking of a Ranger that I used to have.
Last edited by 6fifty_f1fifty; May 8, 2011 at 08:07 PM. Reason: Remembering apparatus re-calibrated.
Moderator
Joined: Jan 2001
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From: Virginia
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.
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Freshman User
Joined: Mar 2011
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From: Lowell
yeah i thought about it, but i wanted to see how easy the fix would be first. lol
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Post Fiend
Joined: Jul 2004
Posts: 8,786
Likes: 28
From: Northern California
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.
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.
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