Another "brake help" thread...

AJ/FormS said

Is your brake warning lite on?
Is it functional?
Prove it works, by continuity-tester, and if the Safety switch at the Combination valve is grounding that light, then you will have to re-align the Shuttle valve. If the shuttle valve has been forced to one side by your bleeding efforts, and it has stuck there, and if it has moved towards the front brakes, it will shut them off! which is by design.
But if the valve is centered with NO-continuity to ground, then we can proceed;

Not an A-body switch but you get the idea. Here the shuttle valve is called the "pressure differential valve".

View attachment 1716315797

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All good info from A.J., and as he mentions, the illustration above is not Mopar, it's another breed .

I've never seen that type of valve on a Mopar, thankfully, they're a ***** to have with line-lock, as they need to be centered everytime you use the line-lock, - to shut off the warning lite, most just have the wire pulled off, so warning function is disabled.

Here's a pic of the Mopar Imbalance Switch, - which are self-centering, when the imbalance/pedal/line-lock is released, the lite goes out. The two opposing springs center the shuttle when there is no pressure in either system.
Cheers.