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Unread 01-09-2014, 03:51 PM   #1
cwig12
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1983 CJ7 
 
Join Date: Jun 2013
Location: Chesterfield, Missouri
Posts: 214
All of the sudden the brakes on my dad's 98 tj went soft when turned on and driving. Checked fluid levels and they are full, checked the vacuum line, clear of debris. When the car is off the brakes are stiff. Also the brake lights won't work either. Any ideas? It's a manual transmission if that matters.

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Unread 01-09-2014, 05:09 PM   #2
JFM626
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2004 TJ Wrangler 
 
Join Date: Feb 2005
Location: Tyee Capital of Canada
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I can't see the two being related, but check you fuses first for the no brake light problem.

For the soft pedal issue, (without loss of brake fluid) I'd pull the wheels and check for loose and broken or missing parts. I have seen where the brake disc pad has fallen out, (high mileage on pads and rusty)
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Unread 01-09-2014, 06:18 PM   #3
cwig12
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1983 CJ7 
 
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Location: Chesterfield, Missouri
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Fuses appear to be fine, checked the brake pedal switch that pushes in and releases against it. That seems to be fine. Ran the hazard lights and everything works, flipped the other switches and those work. Reseated some connections and still nothing.
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Unread 01-09-2014, 07:04 PM   #4
JFM626
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Quote:
Originally Posted by cwig12 View Post
Fuses appear to be fine.
With the new style fuses, a visual check quite often is not enough. Use a multi mrter set to ohms to check for continuity. You don't need to remove the fuse to do this. As well as checking the fuses under the dash, check the ones under the hood as well.
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Unread 01-09-2014, 08:14 PM   #5
Karottop
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1998 TJ Wrangler 
 
Join Date: Sep 2012
Location: Mt. Airy, MD
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When the jeep is running does and you press the pedal, does it slowly creep to the floor? Can you pump it to regain pressure? Check the floor of the jeep on the drivers side for wetness. If the master cylinder is leaking it will usually leak on the inside, and it might not be visible right away in the reservoir.
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Unread 01-09-2014, 08:21 PM   #6
cwig12
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Ill have to check, unfortunately it's all wet due to melting snow. Thanks.
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