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post #1 of 26 Old 09-28-2013, 12:35 PM Thread Starter
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Red Brake light on

Red Brake light on and off. It is kicking my cruise off the main issue!

I have replaced the vac pump and also unhooked the wire on the parking brake. Any ides?

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post #2 of 26 Old 09-28-2013, 01:44 PM
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how are the brakes ? spongy feeling? level and condition of brake fluid?

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post #3 of 26 Old 09-28-2013, 03:09 PM
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there is a vacuum sensor on the driver side inner fender well. you could have a bad connection

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post #4 of 26 Old 09-28-2013, 05:41 PM
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Brakes low. Check the front pad thickness.
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post #5 of 26 Old 09-28-2013, 06:09 PM
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there are 3 reasons the brake light on the dash comes on

1 the parking brake is on. you've disconnected the wire so it won't ground therefore this is not a problem

2 there is low vacuum at the sensor on the driver side inner fender. the sensor could be bad or cracked or unplugged

3 there is a problem with the master cylinder.

94.5 F250 Reg Cab 4x4 5 speed 4.10 276000 plus miles

97 F350 Crew Cab LB 4x4 5 speed 3.55 320000 plus miles (parts truck)



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post #6 of 26 Old 09-28-2013, 06:40 PM
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4- leaking brake lines have let fluid out and the pressure differential valve is tripping the warning light

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post #7 of 26 Old 09-29-2013, 05:19 AM
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and whee is this valve?

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post #8 of 26 Old 09-29-2013, 05:57 AM Thread Starter
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Quote:
Originally Posted by dirtcrew51m View Post
Brakes low. Check the front pad thickness.
New brakes all the way around


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post #9 of 26 Old 09-29-2013, 05:58 AM Thread Starter
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Quote:
Originally Posted by greasyF250 View Post
how are the brakes ? spongy feeling? level and condition of brake fluid?
Level is good. Brakes feel fine


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post #10 of 26 Old 09-29-2013, 05:59 AM Thread Starter
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Quote:
Originally Posted by terryknight View Post
there is a vacuum sensor on the driver side inner fender well. you could have a bad connection
Picture?


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2x4 Dually 7.3 with 80,000 miles as of 3-10-15
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