Moparts Main Index | READ - Info & Help Page | Moparts Sponsors | Tech Archive

Forums Calendar Active Threads Search Forum Help
Previous Thread
Next Thread
Print Thread
is it possible to test the switch in the brake system #70540
06/09/08 06:15 PM 06/09/08 06:15 PM
Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
R
ryan053 Offline OP
pro stock
ryan053  Offline OP
pro stock
R

Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
My brake system light is on and i was wondering if its possible to test the brake switch that is located in the proportioning valve? its a stock one for a 68 charger. Does anyone know a source for replacement switches? i havent had any luck finding one locally at the parts places.
Re: is it possible to test the switch in the brake system [Re: ryan053] #70541
06/09/08 06:26 PM 06/09/08 06:26 PM
Joined: Jan 2003
Posts: 32,992
Grand Prairie,Texas
stumpy Offline
I Win
stumpy  Offline
I Win

Joined: Jan 2003
Posts: 32,992
Grand Prairie,Texas
Have you checked your emergency brake light switch?
Re: is it possible to test the switch in the brake syst [Re: stumpy] #70542
06/09/08 06:34 PM 06/09/08 06:34 PM
Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
R
ryan053 Offline OP
pro stock
ryan053  Offline OP
pro stock
R

Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
negative
Re: is it possible to test the switch in the brake syst [Re: ryan053] #70543
06/09/08 06:38 PM 06/09/08 06:38 PM
Joined: Jan 2003
Posts: 32,992
Grand Prairie,Texas
stumpy Offline
I Win
stumpy  Offline
I Win

Joined: Jan 2003
Posts: 32,992
Grand Prairie,Texas
Did or didn't?
Re: is it possible to test the switch in the brake syst [Re: stumpy] #70544
06/09/08 07:29 PM 06/09/08 07:29 PM
Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
R
ryan053 Offline OP
pro stock
ryan053  Offline OP
pro stock
R

Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
i just pushed it in and it made no difference. i cant find a source for those locally either though. does anyone know if other cars share the same switches so i have a broader search base?
Re: is it possible to test the switch in the brake syst [Re: stumpy] #70545
06/09/08 09:22 PM 06/09/08 09:22 PM
Joined: Nov 2004
Posts: 9,316
SoCal
68HemiB Offline
master
68HemiB  Offline
master

Joined: Nov 2004
Posts: 9,316
SoCal
Quote:

Have you checked your emergency brake light switch?



The point being made here is that the light could be on because of the "imbalance" function of the proportioning valve that you are preoccupied with OR from the park brake switch (or in rare cases, a shorted wire on the way to either). Establish which is the source of the light (by unplugging the connector at first one switch, and then the other) before digging into the hydraulics.

If it does turn out to be from the proportioning valve, know that is sometimes possible to get it re-centered by causing a leak (via opening a bleeder and pressing on the brake pedal) from the side opposite the side that was low enough to shift it in the first place.

Down to just a blue car now.
Re: is it possible to test the switch in the brake syst [Re: 68HemiB] #70546
06/10/08 10:27 PM 06/10/08 10:27 PM
Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
R
ryan053 Offline OP
pro stock
ryan053  Offline OP
pro stock
R

Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
so i just checked again and the light gets brighter when i apply the e brake so its not the e brake switch. I guess i will try bleeding all the brakes this week and see if i get any change. does any one know of a source for the switch in the proportioning valve though?
Re: is it possible to test the switch in the brake system [Re: ryan053] #70547
06/10/08 10:51 PM 06/10/08 10:51 PM
Joined: Jan 2003
Posts: 6,252
Zzyzx Road
beepbeep Offline
moparts member
beepbeep  Offline
moparts member

Joined: Jan 2003
Posts: 6,252
Zzyzx Road
Quote:

My brake system light is on and i was wondering if its possible to test the brake switch that is located in the proportioning valve? its a stock one for a 68 charger. Does anyone know a source for replacement switches? i havent had any luck finding one locally at the parts places.

Drum or disc brakes? Drum brakes do not have a prop valve. If disc and the system is original the prop valve is a separate valve.

Amazing how an unchallenged lie can become the absolute truth.
Re: is it possible to test the switch in the brake syst [Re: beepbeep] #70548
06/10/08 11:47 PM 06/10/08 11:47 PM
Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
R
ryan053 Offline OP
pro stock
ryan053  Offline OP
pro stock
R

Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
drums all around. It has some sort of distribution block that has an electrical switch in it.
Re: is it possible to test the switch in the brake syst [Re: ryan053] #70549
06/11/08 10:41 AM 06/11/08 10:41 AM
Joined: Jan 2003
Posts: 32,992
Grand Prairie,Texas
stumpy Offline
I Win
stumpy  Offline
I Win

Joined: Jan 2003
Posts: 32,992
Grand Prairie,Texas
Does the light go out when you uplug that wire from the block?
Re: is it possible to test the switch in the brake syst [Re: 68HemiB] #70550
06/11/08 11:12 AM 06/11/08 11:12 AM
Joined: Jan 2006
Posts: 1,220
toronto canada
69chargeryeehaa Offline
pro stock
69chargeryeehaa  Offline
pro stock

Joined: Jan 2006
Posts: 1,220
toronto canada
Quote:

Quote:

Have you checked your emergency brake light switch?



The point being made here is that the light could be on because of the "imbalance" function of the proportioning valve that you are preoccupied with OR from the park brake switch (or in rare cases, a shorted wire on the way to either). Establish which is the source of the light (by unplugging the connector at first one switch, and then the other) before digging into the hydraulics.

If it does turn out to be from the proportioning valve, know that is sometimes possible to get it re-centered by causing a leak (via opening a bleeder and pressing on the brake pedal) from the side opposite the side that was low enough to shift it in the first place.





i had the same problem, turned out to be the master cylinder. after changing it and bleeding the brakes the light went off....you could remove it and put in a tooth pick and test it, it's just a little plunger that triggers the switch. You can remove the switch from the block and test it on the bench....

Re: is it possible to test the switch in the brake syst [Re: stumpy] #70551
06/11/08 12:04 PM 06/11/08 12:04 PM
Joined: Nov 2004
Posts: 9,316
SoCal
68HemiB Offline
master
68HemiB  Offline
master

Joined: Nov 2004
Posts: 9,316
SoCal
Quote:

Does the light go out when you uplug that wire from the block?



O.P. is clearly unable or unwilling to unplug wires for some reason.

Down to just a blue car now.
Re: is it possible to test the switch in the brake syst [Re: 68HemiB] #70552
06/12/08 12:16 AM 06/12/08 12:16 AM
Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
R
ryan053 Offline OP
pro stock
ryan053  Offline OP
pro stock
R

Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
the light turns off when i unplug the wire from the distribution block. So does anyone know where to get a new switch from?
Re: is it possible to test the switch in the brake syst [Re: ryan053] #70553
06/13/08 01:27 AM 06/13/08 01:27 AM
Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca
R
ryan053 Offline OP
pro stock
ryan053  Offline OP
pro stock
R

Joined: Aug 2003
Posts: 1,345
Rohnert Park, Ca


Moderated by  Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer 
Privacy Policy · Forum Rules · Mark All Read Contact Us · Moparts




Moparts Main Index | READ - Info & Help Page | Moparts Sponsors | Tech Archive


Powered by UBB.threads™ PHP Forum Software 7.7.1