NEVER poke wire through the rubber brake flex hose, it damages the inner hose ply.

There is no ball or valve in the rubber brake flex hose = any blockage indicates a junk hose that MUST be replaced.


Here is all the data you need on brake hoses..

Brake:
http://www.peachparts.com/shopforum/showthread.php?t=142411



Have a great day.

__________________
ASE Master Mechanic

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D

https://www.boldegoist.com/