Unknown control knob

[lgunder]

On my 2005 Explorer V8 4WD there is a numbered knob next to the master cylinder. Does anyone know what this is for? I saw this while trying to locate the cruise control pressure switch which appears to be under the master cylinder attached from the bottom up.

 

[96firephoenix]

Something related to a trailer brake controller?

 

[sfhess]

Adjustable proportioning valve.

 

[odinjunior]

A picture would help to identify it...

 

[Number4]

Alarm sensitivity switch?


Bomb delay switch?

 

[Machine090767]

Does it say 710 on it ??