  We systematically study model-independent constraints on the three generic
charged Higgs couplings to $b$-quarks and up-type quarks. While existing LHC
searches have focussed on the $tb$ coupling, we emphasize that the LHC plays a
crucial role in probing also $ub$ and $cb$ couplings, since constraints from
flavor physics are weak. In particular we propose various new searches that can
significantly extend the present reach on the parameter space by: i) looking
for light charged Higgses that decay into $ub$-quarks, ii) probing charged
Higgs couplings to light and top quarks using multi-$b$-jet signatures, iii)
looking for single $b$-quarks in low-mass dijet searches, iv) searching for
charge asymmetries induced by charged Higgs production via $ub$ couplings.
