84 Brake Pressure Warning Switch
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Joined: Apr 2010
Posts: 54
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From: Mandeville Louisiana
84 Brake Pressure Warning Switch
Is there any way to check if this part is bad? I am trying to get my 84 back on the road. It has been sitting for a few years. I have it started and running. I have replaced the brake booster, MC, rotors, pads and flushed system. The brakes are solid. The dash Brake Warning light is on. The Warning switch is the original I moved from the old MC to the new. With switch removed the MC looks good. No brake fluid leaking from the switch. Valve in MC seems to be lined up. Just seems so expensive for a small part with a spring in it and difficult to locate.
Thanks,
John
Thanks,
John
Safety Car
Joined: Aug 2009
Posts: 3,752
Likes: 277
From: Melbourne, Victoria, Australia
The white brake warning switch on the master cylinder indicates if there is a brake pressure imbalance between the front and rear brakes.
If there is an imbalance the white spring loaded switch will contact the metal recess of the combination piston which is spring loaded so will stay in the failed position, i think you will need to bleed the front and rear brakes with it removed and refit when the bleeding is finished. Not 100% sure on this. Maybe removing the warning switch after bleeding the brakes will work.
The white brake warning switch is fairly in expensive was only a few dollars i think when i broke mine a year or so ago.
Good luck
If there is an imbalance the white spring loaded switch will contact the metal recess of the combination piston which is spring loaded so will stay in the failed position, i think you will need to bleed the front and rear brakes with it removed and refit when the bleeding is finished. Not 100% sure on this. Maybe removing the warning switch after bleeding the brakes will work.
The white brake warning switch is fairly in expensive was only a few dollars i think when i broke mine a year or so ago.
Good luck
Le Mans Master
Joined: Aug 2000
Posts: 8,838
Likes: 31
From: Australia
If not; switch is faulty.
If light goes off and on then brake system need rebalancing ,
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Joined: Apr 2010
Posts: 54
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From: Mandeville Louisiana
Haven't had it on the road yet. Had it around the block several times.
It stops well. No license plates yet. No hard stops, don't want to draw attention to it yet!
If yours doesn't stop, check the booster. Common failure!
John
It stops well. No license plates yet. No hard stops, don't want to draw attention to it yet!
If yours doesn't stop, check the booster. Common failure!
John
