How would I know if my shifter is broken

[chiproth22]

This concerns a Shimano Tiagra 4600 2x shifter.

There is travel remaining in the rear deraileur, but none in the shifter itself. I can't reach the two biggest cogs using either of the front chainrings.

I did dump the bike, albeit not hard. However, that accident caused the shifter housing to become out of line with the handlebars. I suspect either my repair efforts or the crash have damaged the shifter.

The crash did bend the rear deraileur, but that has since been replaced and aligned.

Thanks,

Chip

[Painkiller]

disconnect cable from derailleur, pull cable by hand and shift it to detect it moving or not. make sure housing is not binding and slips freely over the cable with no binding