[Mgs] Brake pressure balance switch

[PaulHunt73]

Possibly, but you can't discount the brakes.  If it's the rear circuit that 
has the problem then it would barely be noticeable in driving.

Firstly disconnect the wiring from the switch and if the warning light goes 
out it is a brake or switch problem, and not wiring.  If it stays on it's 
wiring, although from 76 on the same warning lamp also comes on with the 
handbrake.

If it is brake or switch pre 76 to centralise the switch you have to open 
the good circuit and operate the brakes slowly to move the shuttle valve 
across until the light goes out, and if you keep pressing it will come back 
on again when the shuttle valve has moved to the other side.  However if the 
light stays on all the time you still don't really know if it is a switch or 
brake problem, except that if it is the brakes you should be losing fluid 
from somewhere.

77 and later you can partially unscrew the switch and it should recentralise 
automatically i.e. the light goes out.  If it doesn't go out then it's 
probably the switch.

PaulH.

----- Original Message ----- 

> My daughter's MGB is showing the brake pressure balance switch on all
> the time. Is it likely that the switch is broken and not a real
> problem with the brakes?
>