[Al Skierkiewicz]

OK,
The Victors do not have much in the way of reverse voltage protection. There are a variety of things that can go bad when you don't watch the wiring. To mangle a "This Old House" phrase check twice, power once. Of the conponents that can go bad we start with the power input. Just like the IR board this year, a 5 volt regulator does exist here as well. There also is a rather large electrolytic cap which you can see hiding in the center of the FETs under the fan. Finally, all the FETS have a diode across them that will likely be forward biased with a voltage reversal. Now it is entirely possible that you got lucky and none of these things has died. You need to check operation to be sure. If it all works then great. Just be advised that the parts have already been stressed. If I needed to use said device, I would be more inclined to use it on a low current motor than a drive motor. Some teams have found that Victor failures usually are just FET problems and have had some success with replacing them. If you Victor is truly dead, get in touch with IFI, they might just repair it for minimal cost. There is a warning in the 884 Victor manual,
WARNING: BEFORE APPLYING POWER:
1. Ensure the input connections are not reversed.
Connecting 12V and GND backwards will
destroy the unit.
As to hooking up the PWM backwards, I am not sure that would do any real damage. The input is diode protected as I remember. You may have damaged the PWM cable but I think the Victor might be OK.