Ok, I have a 95 monty LS with about 149K. About 2 weeks ago my brake light came on so i checked the fluid and it was low. I added some Dot 3 and the liht went off. Well, its been about 2 weeks or a little less and the light just came back on. I again checked the fluid and it appeard to be a little low so i added a little more. The light didnt go off this time. As far as the way the car is braking, everything seems normal like always. Where should i go from here? Thanks

You have a leak which you know. If you are a novice you should take it to a shop to get it checked. You do not want to blow a line or hose.

Since most would ignore what I just said.

Check to see if the front brake hoses are wet or swelling.
Look around the place you added fluid for wet spots or bubbling/faided paint.

Check the rear brake hose for wetness or swelling.

Thanks, appreciate the advice

What tag said with regards to taking it to a qualified shop if you don't know what your doing. At minimum have a 'good' friend who 'knows' what they're doing help you troubleshoot and repair them. This is not the kind of job you want to get web advice on unless you have a simple & specific question.

What's wrong isn't specific enough. <img src="/forums/images/graemlins/smile.gif" alt="" /> <img src="/forums/images/graemlins/wink.gif" alt="" />

Seriously be careful deciding if you repair this yourself or have someone do it for you.

Now that said, if you're just getting informed insights so you won't go into a shop blind, have at it. <img src="/forums/images/graemlins/kewl.gif" alt="" />

Oh, I would check for tell tale signs of leakage (bubbling up paint (it will eat your cars paint)). Some common areas of failure are the rubber line at the diff in back, and at each front wheel; the reservoir cap rubber gasket; the master cylinder, the front caliper pistons, the rear brake pistons, etc.

It's simple to fix, once you know what you're doing or have someone who does look over your shoulder as you repair it.

I bet it's the master cylinder o-ring, look at the area between the master cylinder and the power booster. If it's leaking you can tell because the paint is soft or missing below them, on the fender well or the booster or both.
If it's the master cylinder replace it with a rebuilt one, only $30 or so and do a search, on here, on how to do it.

I think you have a leak too, so I will ditto what everyone else has said. However... regarding the light not going off the last time you added fluid -- if you added brake fluid to the upper line of the reservoir and the light still doesn't go off, check the diaphragm inside the reservoir cover. Sometimes it gets distended, and pushes on the float switch, making the light come on even when your reservoir is full...

One more thing to check <img src="/forums/images/graemlins/kewl.gif" alt="" />

Eric W.

I haven't done an fsm lookup, but you may have a differential pressure switch that sees if there's a leak at front or rear (not holding same pressure) and triggers the light.

(edit) Nope, all that turns the light on is the parking brake switch and the low fluid level switch...

and if the fluid is dirty, it will hold the float switch down and cause the light to stay on.