I wouldn't say shot, but the first test I would do is see if you have a zero impedance reading across the B to B/U terminals. That is the first place power goes when entering into the wiper switch is to the circuit breaker. For a whole lot of nothing to happen, forward or park, that's what might be the issue. Unplug the four wire socket and the single socket that is on the side as mounted. The very top terminal is the B terminal and this single terminal is the B/U.
Also check for incoming 12 volts between the pink wire terminal in the socket and dash ground.

Jim