Wire?

[ralphsmith_jr]

Can anyone tell me what this wire goes to? I found it on the drivers side under the brake cylinder..I have no clue what it plugs into, also from what I have read on here I am guessing that my master cylinder has been replaced, can anyone confirm? Sorry newbie with questions

 

[Chuck Leeper]

Looks like the plug for the proportioning valve. On the frame, below the firewall, driver side.

 

[GullsGN]

Your breaks have been converted from the stock Powermaster to vacuum breaks.

 

[GullsGN]

It also looks like you still have the heat shield on your header. Better make sure the crack in the header has been welded.

 

[ralphsmith_jr]

Thanks guys...I can take the heat shield off its this is a must I really dont know? You said there was a crack? The proportioning valve is that for the old break set up?

 

[GullsGN]

Thanks guys...I can take the heat shield off its this is a must I really dont know? You said there was a crack? The proportioning valve is that for the old break set up?

Most of the time when the crack is welded the heat shield doesn't make it back on. Not really needed. All of these headers crack at the junction of the rear tube. Look closely with a good flashlight and you should see either a weld or a crack.

 

[Chuck Leeper]

My bad... the wrong answer.

 

[ralphsmith_jr]

So if this is not the proportioning valve than???? Any clues?

 

[that national]

it does look like the plug that plugs into the proportioning valve, if it is im surprised your break light isnt on in the dash

 

[Chuck Leeper]

My bad..

My bad... the wrong answer.

The right answer??

 

[ralphsmith_jr]

No brake light on? Since my brakes were converted is this wire necessary?

 

[G NASTY]

My car also has the wire not connected but I still have a PM and no break light

 

[nwarky]

That wire definitely connects to the stock brake proportioning valve. It's function is to warn that there is a problem in the dual master cylinder by lighting the brake light on the dash. This is true whether your system is still Powermaster, vacuum or Hydroboost. The fact that it is unconnected and your brake light on the dash is not ON indicates the system is not working properly. Does your dash brake light come ON with the parking brake? If not, the bulb is also needing replacement. I wouldn't feel confident of the condition of my brake system until this gets figured out.

Dean

 

[ralphsmith_jr]

Pushed the parking brake in and the light came on????