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Author Topic: Brake Indicator Light  (Read 2696 times)

Bob Schaefer

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Brake Indicator Light
« on: August 09, 2013, 05:06:31 PM »

That said, Mopar Night at the local Cruise was fun.
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1969 Dodge Monaco Wagon
383 4bbl, Dual Exhaust
Electronic Ingnition

dana44

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Brake Indicator Light
« Reply #1 on: August 09, 2013, 05:24:52 PM »

It can also be an idication of an imbalance of the master cylinder, so check the fluid level first.
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68 Charger 440 6pac/02 PT Cruiser/63 TR4 2.5 5spd/39 Nash Business Coupe/95 Dakota Sport 3.9 5spd/81 Z28/ USN Retired

Bob Schaefer

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Brake Indicator Light
« Reply #2 on: August 09, 2013, 05:56:31 PM »

See, now that's why we come here.. I'll check that first thing in the AM. Thank you.
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1969 Dodge Monaco Wagon
383 4bbl, Dual Exhaust
Electronic Ingnition

Snotty

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Brake Indicator Light
« Reply #3 on: August 10, 2013, 08:57:33 AM »

If the fluid is fine it could be the problem I have - the nut on the e-brake cable under the dash, next to the kick panel, could have worked loose.  If so, the warning light will come on because it thinks the brake is applied.  (The cable does not pull out and triggers the switch.)  I have to re-tighten mine about every three months.  (One day I'll get the right nut!!!)  It's worth a look.
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It's green here in Chico!!

dana44

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Brake Indicator Light
« Reply #4 on: August 10, 2013, 09:17:01 AM »

That's the only other thing it could be, it is just a pressure switch, both hydraulic in the porportioning valve and unpressure switch at the emergency brake.
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68 Charger 440 6pac/02 PT Cruiser/63 TR4 2.5 5spd/39 Nash Business Coupe/95 Dakota Sport 3.9 5spd/81 Z28/ USN Retired

Brian

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Brake Indicator Light
« Reply #5 on: August 10, 2013, 10:51:45 AM »

Sometimes mine comes on in the wagon when the E-brake pedal does not come all the way up to break the circuit on the warning light.  Try pulling the E-brake handle, and lifting up on the back side of the pedal arm with your foot....light might go out then.

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Brian

02 Chrysler Concorde Lxi
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68 Chrysler Station Wagon 440/auto
48 Desoto 2dr Sedan flat 6/3spd manual

Steve

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Brake Indicator Light
« Reply #6 on: August 10, 2013, 01:33:25 PM »

Quote from: thrashingcows
Sometimes mine comes on in the wagon when the E-brake pedal does not come all the way up to break the circuit on the warning light.  Try pulling the E-brake handle, and lifting up on the back side of the pedal arm with your foot....light might go out then.

Beat me too it.
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Bob Schaefer

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Brake Indicator Light
« Reply #7 on: August 25, 2013, 08:58:11 AM »

I have opened the resevoir, and it appears to be full. I have checked the switch on the E-Brake pedal, and with the pedal applied, I can manually operate the switch, but it does not change the light.
One question I have is, does that switch have 1 lead or 2? There is only 1 wire going to it right now, and no place for another wire. I don't see anything that may have come disconnected, but it's weird to me that there would only be 1 wire.


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1969 Dodge Monaco Wagon
383 4bbl, Dual Exhaust
Electronic Ingnition

dana44

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Brake Indicator Light
« Reply #8 on: August 25, 2013, 09:12:17 AM »

Yes, this is a one wire switch. It grounds out and sets the light itself. See if the wire that connects to the switch on the porportioning valve, when removed, shuts the light off. Wouldn't be the first time a sensor stops working. When was the last time the brakes themselves have been checked, adjusted, that kind of stuff?
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68 Charger 440 6pac/02 PT Cruiser/63 TR4 2.5 5spd/39 Nash Business Coupe/95 Dakota Sport 3.9 5spd/81 Z28/ USN Retired

Bob Schaefer

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Brake Indicator Light
« Reply #9 on: August 25, 2013, 09:21:50 AM »

Well, my friend who had the car replaced the rear brake lines and wheel cylinders. The front had been done previously. I will check the wire on the proportioning valve.
This is of the big differences between this and my Polara wagon... The Polara didn't have power brakes.


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1969 Dodge Monaco Wagon
383 4bbl, Dual Exhaust
Electronic Ingnition

dana44

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Brake Indicator Light
« Reply #10 on: August 25, 2013, 09:38:23 AM »

If the switch on the emergency brake isn't setting the brake light on the dash, then it has to be on the porportioning valve switch. Since this switch is a pressure switch for an imbalance, troubleshoot its reason for coming on. They tend to stay on when there is a problem and then go out when the problem is fixed, as in equal pressure resets the switch. So the brakes could be moving too much in relation to front/rear, or the fluid pressure within the master cylinder isn't pressurizing properly (low fluid check half tests), the other half would be one of the two piston cups leaking so only half the brakes (front or rear) are working properly.  If you can get someone to gently press the brake pedal while looking at the master cylinder reservoir to see if there is something weird there, like fluid moving in only one of the reservoirs or actually reversing and filling one may help diagnose. Remember, either put the cap back on or release the brake pedal real real gentle to prevent the MC from squirting fluid all over the place when done.
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68 Charger 440 6pac/02 PT Cruiser/63 TR4 2.5 5spd/39 Nash Business Coupe/95 Dakota Sport 3.9 5spd/81 Z28/ USN Retired

Bob Schaefer

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Brake Indicator Light
« Reply #11 on: August 25, 2013, 10:59:37 AM »

Thanks.
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1969 Dodge Monaco Wagon
383 4bbl, Dual Exhaust
Electronic Ingnition

dana44

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Brake Indicator Light
« Reply #12 on: August 25, 2013, 11:17:37 AM »

OK, so you have the issue isolated, now you have to troubleshoot the issue.
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68 Charger 440 6pac/02 PT Cruiser/63 TR4 2.5 5spd/39 Nash Business Coupe/95 Dakota Sport 3.9 5spd/81 Z28/ USN Retired

Steve

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Brake Indicator Light
« Reply #13 on: August 25, 2013, 03:35:51 PM »

You may need rear linings or the wheel cylinders are shot.
How much travel is there in the brake pedal?
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Favorite Expression. . . Damned Kids.  Lots of projects.  Donations accepted

Bob Schaefer

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Brake Indicator Light
« Reply #14 on: August 25, 2013, 05:43:39 PM »


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1969 Dodge Monaco Wagon
383 4bbl, Dual Exhaust
Electronic Ingnition
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